Your tax argument is flawed. Look at the bush tax cuts...The reason it worked in the 20's and 60's was the fact that the tax rate, at least in JFK's instance, went from 91% to 70%. You are talking now from something like 38% to whatever. History shows that tax cuts below the 50% rate reduce revenue. You are using the most extreme example to make a blanket statement. It makes good theater not good economics, especially with todays tax rates.
Again, facts will bring out the truth.
1) Lower tax rates do not mean less tax revenue.
The tax cuts of the 1920s
Tax rates were slashed dramatically during the 1920s, dropping from over 70 percent to less than 25 percent. What happened? Personal income tax revenues increased substantially during the 1920s, despite the reduction in rates. Revenues rose from $719 million in 1921 to $1164 million in 1928, an increase of more than 61 percent.
The Kennedy tax cuts
President Hoover dramatically increased tax rates in the 1930s and President Roosevelt compounded the damage by pushing marginal tax rates to more than 90 percent. Recognizing that high tax rates were hindering the economy, President Kennedy proposed across-the-board tax rate reductions that reduced the top tax rate from more than 90 percent down to 70 percent. What happened? Tax revenues climbed from $94 billion in 1961 to $153 billion in 1968, an increase of 62 percent (33 percent after adjusting for inflation).
The Reagan tax cuts
Thanks to "bracket creep," the inflation of the 1970s pushed millions of taxpayers into higher tax brackets even though their inflation-adjusted incomes were not rising. To help offset this tax increase and also to improve incentives to work, save, and invest, President Reagan proposed sweeping tax rate reductions during the 1980s. What happened? Total tax revenues climbed by 99.4 percent during the 1980s, and the results are even more impressive when looking at what happened to personal income tax revenues. Once the economy received an unambiguous tax cut in January 1983, income tax revenues climbed dramatically, increasing by more than 54 percent by 1989 (28 percent after adjusting for inflation).
According to then-U.S. Representative Jack Kemp (R-NY), one of the chief architects of the Reagan tax cuts:
At some point, additional taxes so discourage the activity being taxed, such as working or investing, that they yield less revenue rather than more. There are, after all, two rates that yield the same amount of revenue: high tax rates on low production, or low rates on high production.
2) The rich pay more when incentives to hide income are reduced.
The tax cuts of the 1920s
The share of the tax burden paid by the rich rose dramatically as tax rates were reduced. The share of the tax burden borne by the rich (those making $50,000 and up in those days) climbed from 44.2 percent in 1921 to 78.4 percent in 1928.
The Kennedy tax cuts
Just as happened in the 1920s, the share of the income tax burden borne by the rich increased following the tax cuts. Tax collections from those making over $50,000 per year climbed by 57 percent between 1963 and 1966, while tax collections from those earning below $50,000 rose 11 percent. As a result, the rich saw their portion of the income tax burden climb from 11.6 percent to 15.1 percent.
The Reagan tax cuts
The share of income taxes paid by the top 10 percent of earners jumped significantly, climbing from 48.0 percent in 1981 to 57.2 percent in 1988. The top 1 percent saw their share of the income tax bill climb even more dramatically, from 17.6 percent in 1981 to 27.5 percent in 1988.
Harmful Spending & Complexity
Lower tax rates are important, but they are not the only critical issue. Both the level of government spending and where that money goes are very important. And even when looking only at tax policy, tax rates are just one piece of the puzzle. If certain types of income are subject to multiple layers of tax, as occurs in the current system, that problem cannot be solved by low rates. Similarly, a tax system with needless levels of complexity will impose heavy costs on the productive sector of the economy.