This would seem a much easier solution to the problem of monopoly holders charging outrageous prices than trying to fix profits or lay a large tax on the profits. However, few governments ever do this. In many cases the patent holders control or heavily influence the government. There is in addition, in most Judeo-Christian societies an assumption that most people have a moral sense and will not take undue advantage of customers just because they have the power to do so. And in the most egregious cases of monopoly pricing there were many other patents where the inventors were not gouging the consumers. It is always been the minority of businesses that have taken gross advantage of patent monopolies. However at some periods, where there was an oligarchy, all the companies in an area abused their patent monopolies together. An example would be the pharmaceutical industry of the early 21st century.