You may indeed know a lot but based on what you have posted here thus far , very little of what you know is about basic economics or effective tax policy.
Can you not see the irony ?
The GOP has shot itself in the foot. If they feel no pain yet... they will.
For decades Democrats have said that the GOP favors the rich and tells the rest of us to eat cake. And now like a self-fulfilling prophecy, the GOP proposes tax cuts that overtly benefit the rich and initiates class warfare.
Even the GOP's proposed three tax rates overtly show the highest incomes getting the biggest tax cut while those with the lowest incomes will get a tax rate increase !
It makes one wonder if covert Democrats have infiltrated the GOP and are working overtime to forever remove the GOP from power. Or maybe the GOP has become so oligarch-obsessed they are committing political suicide. Either way... the GOP has proposed its own trip to the political graveyard.