Somebody on the other side is saying the same thing.
He's all over the place saying all sorts of things.
Some of them are. It isn't the government's business to set salaries for anyone in the private sector, but there's nothing wrong with Trump saying that the boards of some companies have not been doing their job, and that the salaries they've approved for some CEOs is ridiculous. From his perspective it's bad business. He's allowed to say that. He's not talking about passing laws to limit CEO salaries.
This is taken out of context. You need to do your research.
Hedge-Fund Magnate Robert Mercer Emerges as a Generous Backer of Cruz