Charlton revealed there's no need for a great number of directors at United.
"He is a fantastic lover of football, and he is very clever when it comes to identifying a player he wants and coming to the board about it. He knows exactly what to do in those situations, and, to be fair, we try to give him exactly what he wants.
"We haven't got many directors at Old Trafford, and we adopt the view that we need good players to be a top team and that the manager is the best person to decide on who they should be.
"We look after the business side of things, Alex the football side, and we give him what he wants. We leave pretty much everything to Alex, in a football sense."