Allison wrote: "But people are, on average, MORE educated now than they were 50 yrs ago."
Allison, this is interesting and, by analogy, provides and insight into your inability to understand tax policy. You see, people may be "MORE educated" in a sense of a higher proportion having spent more years in school, but they know less than previous generations. If you've read John Adams you read that the language barrier in the Netherlands wasn't a problem for John Quincy because all the lectures were in Latin and Greek, anyway.
In the case of tax rates, you should know that in EVERY historical instance when tax RATES were lowered, tax REVENUES increased. Read that again, would you? Your willful ignorance about this has become embarrassing.