Morality is objective and independent of the people. Your "exploitative oppressors" and "the common man" are subjective terms, ergo it is open to debate whether they would be right or wrong in serving one or the other.
Wealth is created nonstop and can never be fully owned by any one part of the population. And even those who own part of it benefit even the likes of you with their ownership. Don't make a fool of yourself by saying you haven't benefited from the likes of Sam Walton, Bill Gates, Steve Jobs, and all those like them.
Also, I don't recognize your right to define productive activity in the economy. I highly doubt you have even half a grasp of what goes on outside your narrow view of the world.