But he does. Sending your kids to Harvard isn't exactly cheap. His personal wealth is only beaten by his political power. Marxism and Leninism are political ideologies, not just economic. Xi also nods his head to Mao, but that doesn't mean anything. Donald Trump also nods his head to Lincoln and Washington.
You don't seem to understand the difference between the party propaganda line, and the actual reality. A lot of urban educated in China do understand this, and know how to toe the line.