The whole problem of monopolies is that they can set the monopoly tax as high as they want. There is no real upper limit. What you suggest will 1) make monopol

The whole problem of monopolies is that they can set the monopoly tax as high as they want. There is no real upper limit. What you suggest will 1) make monopolies legal 2) set a floor for the monopoly tax (whilst excessive company profits are bad, obviously companies MUST make a profit, and hence whatever this governor sets as extra tax must be added to the costs for customers. Profit = good (even if you are a communist), only excessive profits or profiteering are bad. Otherwise, after a short while, no more company, no more goods, no more service. No exceptions, not even under different systems. Or in other words: communist companies must make profits too, and just ask some older Russians, even if that means making a profit at the expense of employees) This seems to me like it would be by far the worst of all worlds. This would mean lots of monopolies, with the specific purpose of making life more expensive.