That'd very true, but they would probably wouldn't loose so many mangers who get fed up of competing against people with huge pockets. Either that or some kind of limit, the game should be more about tactics and skill, not how much disposable income some one has, that's just far too unbalanced.
You either spend a lot of time searching for fast trainer. Watch ads then pump the player for it, again spending time on it. Or you can do it in two clicks: buy tokens and move the slider. What to spend: time or money is up to you to choose.
If the game "decided" that you will lose, you will lose.
Sorry for the English. This is google translate.