~snip~
I think having more matches would mean more fans, and more games, more tv income and even maybe more merch sales as well. All of that combined there is more money to be made this way and I think Fifa only cares about that. If you can make more money, then find the method that gives you the most money.

This is exactly the reason I say that it will eventually be 64 team thing, for a while that is as high as it will get, I doubt it will get any higher but we will see that. Why? Only reason; money. Because 64 teams means even more money, and easier setup as well, like 2 teams from each group means 32, then face each other to 16 and then quarter then semi then finals, simple method and will happen.