United captain Neville, who recently accused fellow players of allowing themselves to be 'mollycoddled' by agents, has been advised by his father, Neville Neville, throughout the bulk of his career.
And he admits that he can see no reason for agents to bank so much money from the game.
Neville said: "I think the quicker that rules are brought in to stop clubs paying agents the better.
"We've all got a role to play. The £70 million going out of the game to agents from transfers doesn't include the money that players pay agents directly, so we're talking hundreds of millions going out of the game every year.
"To me, it is just absolutely crazy. I can't get my head around it. I can't understand what they do to earn that much money.
"However, agents have been part of the game for a long time and enjoy a lot of influence, so Gary Neville is not going to stop them by rambling on."