I know it would never happen but it would stop football being all about money. It would stop teams like Man Utd dominating the premier league simply because they have money. It would stop the ridiculous £5m a week type wages, it would make cities invest more in young people (currently, why would Hull City bother when they know that anyone decent will bugger off to the premier league once they have the opportunity) - it wouldn't make football be about community, talent, pride and football rather than money.
I mean, how does Man Utd represent Manchester when most of their players (if not not all) are from various parts of the world?