Bad ideas flourish because they are in the interest of powerful groups.

On the political as on the economic front it's important not to fall into the "not as bad as" trap. High unemployment isn't O.K. just because it hasn't hit 1933 levels; ominous political trends shouldn’t be dismissed just because there’s no Hitler in sight.

But where will the Fed find another bubble?

The key reason executives are paid so much now is that they appoint the members of the corporate board that determines their compensation and control many of the perks that board members count on. So it's not the invisible hand of the market that leads to those monumental executive incomes; it's the invisible handshake in the boardroom.

It should be possible to emphasize to students that the level of employment is a macroeconomic issue, depending in the short run on aggregate demand and depending in the long run on the natural rate of unemployment, with microeconomic policies like tariffs having little net effect. Trade policy should be debated in terms of its impact on efficiency, not in terms of phoney numbers about jobs created or lost.

In short, what the living wage is really about is not living standards, or even economics, but morality. Its advocates are basically opposed to the idea that wages are a market price-determined by supply and demand, the same as the price of apples or coal. And it is for that reason, rather than the practical details, that the broader political movement of which the demand for a living wage is the leading edge is ultimately doomed to failure: For the amorality of the market economy is part of its essence, and cannot be legislated away.

[I]f you look at United States history since World War II, you find that of the 10 presidents who preceded Barack Obama, seven left office with a debt ratio lower than when they came in. Who were the three exceptions? Ronald Reagan and the two George Bushes.