He didn't become rich because of his entrepreneurship. The year Robert Maplethorpe received his grant, his was one of only two of the 4600 awarded by the NEA, considered obscene. Arguments such as Schlafly's would be ludicrous if they weren't taken seriously. They are typical of the attitude of our political system. Capitalism is always seeking for ways to streamline itself.
Efficiency is crucial to survival.
Social programs that cannot be turned to promoting values favorable to the system, are only a drain on this profit-making machine. The arts we do see reflect corporate tastes. Corporations give to the arts not because they have a deep concern for sculpture, music, or the theater, but because it affords a lucrative tax break while promoting their image as good citizens. Obviously, corporations and the government will not fund art which furthers an understanding of class exploitation or the struggle of workers. This would constitute a challenge to capitalism.