I think, more simply, most members of both parties push to increase their own power. It wasn't supposed to work that way. The Federal government was supposed to be limited to a few, specific enumerated powers. But there's too much power in the free-for-all do-anything control-everything leviathan it's become.

You'll never stop the corruption until the power is taken away, i.e., more carefully checked and balanced, and where appropriate, cut back.

Everything should be controlled at the smallest, most local level possible, not the largest.