I have to say I disagree. By the very fact you have to compensate players for not having a 9-5 you are going to have to pay them more to be full-time footballers. Part-time guys can earn almost as much outside of football, so why would you have to pay them a full-time football wage on top of that?
In any event, it's up to the clubs to find a sustainable level but nobody wants to make the first move. Slowly but surely it's happening, though, and full-time wages are becoming far more sensible.