Unless, of course, intelligence is "bad" for the wealthy and "good" for the poor, but I doubt that's the case...
But intelligence without wealth can easily be beaten by average intelligence plus wealth and status. E.g. Trump
'Inheritance' doesn't have to mean just what was passed down at death - it must also include all the additional resources available during development to have any meaning.
But if you are saying that education makes little difference to lifetime earnings, you're going to have to back that up with a reference because it's an extraordinary claim.
It goes back in time too. Winners of 1832 Georgia land lottery were given free land of significant value by the government to settle and farm. After a few decades, they weren't any better off than the nonwinners.