Almost all countries give priority to sports. But there are some countries whose economic condition is bad, they cannot spend the same amount of money on sports as all the other countries. If there is corruption in the management of a country, then that country will never be able to do anything good in sports. Because whenever a good player gets a chance in the national team, he will be called up from the team due to many problems. An incompetent person will be called up in his place. If corruption can be removed from the middle of the game, then maybe every country will play very well.
That's the reason why we have independent sports bodies such as the FIFA. Whenever such an issue is noticed, FIFA immediately suspends the national football association, and ask them to mend their ways before re-admitting them. But then we can't always say that there is no bias within FIFA. For example, an African association with limited funds and influence will be much more likely to get banned when compared to a rucb Arab nation, or a football association from any of the European countries.