Does a competition wish to be a closed shop? How would nations ever excel if they were excluded through a qualification process?
Who is to decide who is better than who?
http://www.fifa.com/worldranking/rankingtable/
The FIFA ranking system suggests Scotland are better than Sweden.
I think...
Granted, I've only been to one country, but without fail, you would see kids all over Malawi playing football with jumpers for goal posts and balls made of plastic bags tied together with string. They would do nothing else than play football.