I find the tax system we have represents a compromise: You need free market mechanisms to implement price discovery for cooperation (products, jobs, etc...) but at the same time you want to prevent the formation of monopolies and extreme bargain powers.
Do you really think that the State prevents monopolies?
Also, if the only purpose of taxation is to prevent monopolies, why do I have to pay taxes?? I do not have any monopole on anything whatsoever.
Besides, there is nothing wrong in having power, per se. If people are free, that means that they can have power. If a company is large enough and offers such a good service that people goes only to this company, a "monopole" appears, but it was
deserved. It was honnestly gained. Think Google or Apple as examples.
Of course, this comes with some power in negotiations. This power is just an acknowledgment of the weight of the actor in the market. No big deal, really.
A guy who sells 10000 a day is more respected in the market than a guy who sells 10. Is that really so unfair??