In addition to not checking out exactly what he was signing up to (as I mentioned before), he probably didn't think about that aspect of the money he was 'earning'...
Just imagine how bad things would have to be for 700 big ones A WEEK not to soften the blow and make you want to give it all up.
(I know there's more to life than money, but for someone who has seemingly sold his soul for a colossal amount of dosh, it obviously ranks pretty highly in his world!)