At present most of these restrictions are used to aid financial equality between teams or encourage the use of local players.
Oppositely, quotas can also dictate teams have a minimum number of a specific type of player.
Racial quotas have also been used in the past with the aim of combating racism.
The presence of foreign players are often argued to be to detriment of domestic players' development, and consequentially the national team.
[14] In the Chinese Super League, where high-profile foreign players often fetch higher transfer fees and salary, state-run media Xinhua criticized clubs that employ foreign reinforcements as "burning money".