I have no idea what you are talking about.
Coolidge, Kennedy, Reagan, and Bush all cut marginal tax rates and the economy responded as people took advantage of the incentives to work more and earn more. That is just fact, jack.
Post hoc, ergo propter hoc. Also, you have many of your facts dead wrong.
Coolidge cut taxes because World War I was over and the high taxes were meant to pay for the war, not as a stimulus. He was the beneficiary of a bubble-driven boom, and he himself was sure it wouldn't last, hence his decision not to run for president in 1928.
Kennedy's tax cut was abandoning the prior idea of discouraging concentration of wealth, and using top tax rates purely as revenue. 77%, where he set the rate, studies show is probably the REAL Laffer point, where higher taxes result in lower revenue. The prosperity of his term was certainly not the result of that tax cut, since it didn't take effect until after his death.
Reagan's tax cut in 1981 was followed by over a year of severe recession, the worst since the Great Depression. The economy didn't fully pick up until 1983, when oil prices dropped after a decade of soaring.
Bush's tax cut -- well, the 2000s speak for themselves, as does the deluge that came at their end.
Since the nation switched back to supply-side economics in the 1980s, per capita economic growth has dropped by more than 50%. THAT'S a fact, Jack.