Surely the importance of these tax cuts depends on the size of the gross domestic product. It would make a lot more sense to say, for instance 3% of GDP per annum than umpteen trillion dollars when few people know how big a slice of the cake that is.

Also, adding up the cumulative effect of tax cuts is a bit of a waste of time. If the economy were growing fast enough, those tax cuts would gradually sink into insignificance.

I doubt it will -- very probably because of the tax cuts. And, of course, the transfer of wealth from poor to rich is a moral issue quite aside from the economic one. Still, as a non-economist, I think that you ought to provide more general context.