You are ignorant beyond belief. Your generalities are insane. A parasitic relationship requires that one of the 2 parties involved contributes NOTHING to the arrangement. Do the CEO's employees get paid and get various benefits? Do the banker's investors get paid? Even the government provides services in return for the taxes they take in, even though they provide those services in the most corrupt and inefficient possible ways. The old are not parasites because in general they have done their share in this country. They have contributed.
So while there are certainly parasites amongst every category you can think of, this kind of thinking is twisted and pathetically ignorant.