This is not true. The moment you set a red line, you're making impossible for the lesser trained to join the wagon for getting a chance to climb the ladder. Also, you're making the capitalist not paying for not hiring lesser people, since none has to hire, there are not faults. The idea is that investors should fight to get you in, but if they're denied, they get the monopoly since no one can enter the market to compete with them by hiring people who is willing to work for less than the regulated wage price is meant is. Plus, wages will not go up easily, since you're killing the force supply by setting a line on it. Milton Friedman explained this properly, you can see his speech on Youtube.