When was the last time you were able to lobby congress to write laws to your liking, or create trade agreements, or author a bill to advantage your financial interests?

That's exactly my point. Corporations have all kinds of power and leverage when negotiating with politicians regarding their tax burden. That's what leads to corruption. Corporations don't even exist as anything other than a legal framework. When you tax a corporation, you are by definition taxing the investors in it. The corporate framework gives those individual investors cover to avoid paying their taxes.

I'm suggesting that you bypass the problem by eliminating corporate taxes, and replacing them with taxes on investors, who individually would not have the leverage to avoid them. As an added bonus, you'd deprive politicians of a powerful tool that they are demonstrably incapable of wielding fairly and effectively.