You're right about the tax numbers, I was referencing 2018 data, so I'll update that. Also I don't disagree with what you said about the deficit spending, I do believe that the long term solution is shrinking government spending, but I don't think that will be politically feasible in the next recession.
As far as a VAT goes, you could adjust the VAT to fall heavily on certain items, but in many ways you're right. My point in that statement was to find a way to tax large corporations. I don't think the US tax code is "perfectly set up to boost taxation" when one of the largest growth sectors pays such low rates. Also the top 25% already pay quite high tax rates, and this option is also politically infeasible at least right now.