Quote Originally Posted by Sarmatian View Post
I know, but at the end of the day, you as an individual pay different total amount depending in which state you live. Corporations likewise.
Yes, but the Federal Government still collects large revenues, including income tax. The US also has a transfer union, so the Federal Government moves money from richer states to poorer ones. Just because noy all taxes are harmonised does not mean there is no fiscal union, there is.

Local taxes are not fully harmonised in the UK either, but we still have a fiscal union.