I know there is plenty of conservative economic theory that supports Trump's thinking
There's 100% of real-world results that do not support Trump's thinking.
And as the articles I posted bear out, this one is no different.
It ought to be clear enough as a general statement that taxing the rich so high they take their businesses to other countries doesn't benefit the nation, and it ought to be common sense that policies that are top-heavy on the side of supporting welfare programs without an increase in sources of wealth doesn't benefit the nation either.
A very simplistic view. No, it's not obvious and history refutes you. Clinton raised taxes. What was the economy like? The taxes on the rich were over 90% in the 1950s. How did the economy do then?
This is really a very complex question with lots of disagreement. But one thing is clear: Trump's tax cuts are a windfall for the rich and will have almost no effect on the middle class and the poor.
It appears that any benefit to the middle class will be canceled by higher gas prices.