A cap like this would have nothing to do with labor. Nobody, laboring, is going to ever be in danger of reaching it.
I believe it would be corrupted to target laborers and the hyper wealthy do not get their money from wages.
Americans need to relearn how to protest, and how to get the boot out of their mouth during primaries. Otherwise everything will be used against the working class while giving the owner class full socialism.
With that said, one of the ways you organize is by pushing for laws in an honest manner. If you just stay negative, people stay home. They want solutions, not problems.
I didn’t say anything about America, I think the concept would occur anywhere. As another said, robber barons are the real problem, and they do so through other financial vehicles/ means.