Let's face it. Supply and demand will never replace "need" and "greed" in political discussions of economic issues.

Talking about the "need" for more affordable housing or more affordable medical care is what will get politicians more votes this election year.

Voters don't want to hear about impersonal things like supply and demand. They want to hear about how their political heroes will stop the villains from "gouging" them or "exploiting" them with high prices.

Moral melodrama is where it's at, politically.

Least of all do voters want to hear about the most fundamental reality of economics-- that what everybody wants has always added up to more than there is.

That is called scarcity-- and if there were no scarcity, there would be no economics. What would be the point, if we could all have everything we want, in whatever amount we want?

There were no economists in the Garden of Eden because everything was available in unlimited abundance.

A politician with good rhetorical skills can create a new Garden of Eden in people's minds, though only in their minds. However, that is sufficient, if that vision or illusion can be kept alive until election day, and its failure to materialize afterwards can be explained away by the obstruction of villains.

One of the many ironies of politics is that those politicians who do the most to reduce supply often express the greatest outrage about high prices.

So long as the voters buy it, the politicians will keep selling it.

Make a list of those politicians who do the most to prevent our drilling for our own oil. Then make a list of those politicians who express the most outrage about the high price of gasoline. Don't be surprised if you see the same names on both lists.

Make a list of those politicians who most loudly lament the lack of "affordable housing." Then make a list of those politicians who have most consistently promoted restrictions on the building of housing, under the banner of "open space" laws, "farmland protection" policies, preventing "urban sprawl," and other politically soothing phrases Again, do not be surprised at seeing the same folks on both lists.

Is it really too "complex" to figure out that taking vast amounts of land off the market will make the price of the remaining land far more expensive? Or that houses built on very expensive land will be very expensive housing?

Despite the current decline in housing prices, a recent advertisement in a Palo Alto, California, newspaper listed a vacant lot for sale at $879,000. If you build anything more elaborate than a tent on that property, you are talking about a million-dollar home, be it ever so humble.

Many of the places with very high housing prices have very modest homes on very small amounts of land. The San Francisco Chronicle ran a story about a graduate student seeking a place to live, "visiting one exorbitantly priced hovel after another."

It is not at all uncommon for land to cost more than the housing that is built on it, in those places where politicians have made housing unaffordable with land use restrictions under pretty names-- all the while lamenting the lack of affordable housing.

So long as politicians can get some people's votes by publicly feeling their pain when it comes to housing costs, and other people's votes by restricting the building of housing, they can have a winning coalition at election time, which is their bottom line.

Economists may point out that the different members of this coalition have conflicting interests that could be better resolved through competition in the marketplace. But how many economists have ever put together a winning coalition?

So long as voters prefer heroes and villains to supply and demand, this game will continue to be played. It is not because supply and demand is too "complex" to understand, but because it is not emotionally satisfying.

In one of those typical San Francisco decisions that makes San Francisco a poster child for the liberal left, the city's Board of Supervisors is moving to block a paint store from renting a vacant building once used by a video rental shop.

That paint store is part of a chain, and chain stores are not liked by a vocal segment of the local population. Chain stores are already banned from some parts of San Francisco, and at least one member of the Board of Supervisors plans to introduce bans on chain stores in other areas.

Chain stores have been disliked for decades, at both local and national levels. Taking advantage of economies of scale that lower their costs of doing business, chain stores are able to charge lower prices than smaller independent stores, and therefore attract customers away from their higher-cost competitors.

The economics of this is certainly not too "complex" to understand. However, politics is not economics, so politicians tend to respond to people's emotional reactions-- and if economic realities stand in the way, then so much the worse for economics.

All sorts of laws and court decisions, going back as far as the 1930s, have tried to prevent the economies of scale that lower costs from being reflected in lower prices that drive high-cost competitors out of business.

Economists may say that benefits always have costs, that there is no free lunch-- but how many votes do economists have?

There was a time when courts would have stopped politicians from interfering with people's property rights by banning chain stores. After all, if whoever owns the vacant video rental store in San Francisco wants to rent it to the paint company, and the paint company is willing to pay the rent, why should politicians be involved in the first place?

However, once the notion of "a living Constitution" became fashionable, the Constitution's protection of property rights has been "interpreted" virtually out of existence by judges.

The biggest losers are not people who own property but people who have to pay higher prices because politicians make it harder for businesses that charge lower prices to come into the community.

Despite the political myth that government is protecting us from big businesses charging monopoly prices, the cold fact is that far more government actions have been taken against businesses that charge low prices than against businesses that charge high prices.

The biggest antitrust cases of a century ago were against the Great Northern Railroad and the Standard Oil Company, both of which charged lower prices than their competitors.

The Robinson-Patman Act of 1936 was called "the anti-Sears, Roebuck law" because it was directed again this and other chains that charged lower prices than smaller retailers could match.

For a long time, there were so-called Fair Trade Laws designed to keep low-cost businesses in general from charging low prices that drive high-cost businesses out of business.

Fortunately, enough sanity eventually prevailed that Fair Trade Laws were repealed. But the emotional needs that such laws met were still there, and today they find an outlet in hostility to Wal-Mart and other "big box" stores-- especially in San Francisco and other bastions of the liberal left.

People have every right to indulge their emotions at their own expense. Unfortunately, through politics, those emotions are expressed in laws and administrative decisions by people who pay no price at all for indulging either their own emotions or the emotions of the people who vote for them.

That is why the Constitution tried to erect barriers to government power, of which property rights were one. But, once judges started saying that "the public interest" over-rides property rights, that left politicians free to call whatever they wanted to do "the public interest."

Neither economics nor property rights are too "complex" to understand. But both get in the way of willful people who seek to deny other people the right to make their own decisions.

Anyone who doesn't like chain stores is free not to shop there. But that is wholly different from saying that they have a right to stop other people from exercising their own freedom of choice. That's not too "complex" to understand.