Cecil, if you were a student in my econ course and you answered an exam question the way you answered this reader question, I would give you at best a C-.
You hopelessly muddled three different concepts:
[ol]
[li]Trickle-down economics[/li][li]Supply-side economics[/li][li]Tax cuts to stimulate job growth[/li][/ol]
Virtually any economist worth his salt will tell you that, other things equal (including spending), cutting taxes stimulates economic activity, and therefore jobs, by increasing aggregate demand (unless we’re already at full employment, in which case it just causes inflation). This is because the recipients of the tax cut spend at least some of the money that would otherwise be taxed away. This is true regardless of who gets the tax cut – wealthy, middle-class, poor – so long as they don’t simply save it all (fat chance of that!). This is the answer to today’s question. It is also, incidentally, the theory that undergirded the Kennedy administration’s hugely successful tax cut in 1963.
Trickle-down economics says (as, to give you credit, you noted) that giving money to wealthy people leads them to increase investment, thereby creating more jobs. This theory also operates through aggregate demand, but via a very different channel – investment, rather than consumer demand. It relies on the assumption that wealthy people make investment decisions on the basis of their personal income. In fact, most investment decisions (real investment in plant and equipment, which is what matters, not buying and selling stocks) are made on the basis of corporate earnings and product demand.
Supply-side economics is a whole different beast. Arthur Laffer’s argument was that the effects of high marginal tax rates on incentives (e.g., work disincentives, investment disincentives) were so strong that if you lowered tax rates you would “unleash” economic forces that would generate economic growth so strong that the increase in income would actually lead to higher tax revenue than the govt had previously received with the higher tax rates. This argument has nothing to do with aggregate demand, only with the disincentive effects of taxes. There is a grain of truth to this argument – the 92% marginal rates of the 1950s probably caused a lot of inefficiency and income loss, as rich people shifted their income and investments around to avoid taxes. But at today’s rates (or even the rates in the 80s) these effects are almost certainly small. As the great former OMB Director Charlie Shultz once remarked, “There is nothing wrong with supply-side economics that division by 50 wouldn’t cure”.
That’s the straight dope on tax rates and jobs, Cecil. If you don’t believe it, send Una out to cut somebody’s taxes (mine, for example).
LINK TO COLUMN: Does cutting taxes create jobs? - The Straight Dope