Didn't strike me as a productive FP branch. 'Nuff said.
Back to the story. Seems like a really stupid idea. The destruction of the middle class is a long-term problem. Not going to fix it with a one-time bandage. So let's pretend Slashdot is still a place where solutions can get serious consideration, though my memories of such days are so old as to be dubious. (How many editors where there back then? Down to the last one now...)
The current tax systems seem to favor greedy monopolists. How about pro-freedom taxation in competition with pro-greedom anti-freedom taxation?
One of my (too many) fantasies would be a progressive tax on profits linked to market share and niche dominance. Determining problematic monopolies could use various metrics, but here are three examples: (1) Lack of customer choice, (2) Inability of new competitors to enter the market, and (3) Lack of freedom of employees to move to a competing company. There should be a delay before the higher rates kick in, thus rewarding innovation, but the natural path to higher retained earnings after that time should involve splitting your great company into two or more competing companies. Don't think of it as a tax on success, but rather as a mechanism to make sure the good ideas get propagated into more companies.
A few minor thoughts: One is that mergers that reduce freedom should get no delay time, but should immediately trigger tax rate escalations. Another involves the case of natural monopolies (often related to network effects), where one solution approach would be to use some of the tax revenue to regulate the natural monopoly while funding research into ways to break the natural monopoly.
Your better ideas are quite welcome. Also questions triggered by my poor writing. Unfortunately I anticipate less welcome responses, if any.