Could you kindly expound on how the incentive example I described would be like a command economy? And how would that be different from the capital gains tax ra

Could you kindly expound on how the incentive example I described would be like a command economy? And how would that be different from the capital gains tax rates we have now ( in the sense the government providing an incentive for investment)? With regards to: >We can't count on noblesse oblige to do it, and involving the state is how we involve democracy in the process. I believe it's the democratic part that bothers me - as, and excuse me if this is a poor analogy, like 3 wolves an one sheep voting on what to have for dinner. I don't want you to think that I am ignorant of the fact that we do need some level of economic leveling for a well functioning society. My concern is how to best achieve that while preserving an individual liberty. Again, appreciate the response.