The last sentence is a blatant, ridiculous copout. You do know that Congress had exactly zero economists come before them and testify about their analysis of the forecasts for the tax “reform” bill, yes? Why do you think that was?
Hint: they couldn’t find any economists who figured that the bill wouldn’t explode the deficit. Tax cuts, by definition, reduce revenue. This bill didn’t do anything to change the calculus of businesses, that would make them voluntarily pay MORE in taxes. The only thing “time will tell” is that the forecasts for increased deficits will come to pass. The last time Republicans passed tax cuts with a promise of more revenue based on growth, the George W. Bush deficits were the result.
It makes me wonder: why do you believe the idiot politicians, all of a sudden, in this one case?