European soccer has no draft, and as far as I can tell no salary or roster restrictions, except maybe nationality restrictions, which is why they have that kind of stratification. Theirs is a dog-eat-dog capitalist system where if a team can't keep up, they'll wind up.
Since baseball has a draft and numerous rules on just how players can get compensated, all within a socialist revenue-share system ensuring not only their survival, but guaranteed profits, there will not be that kind of stratification.