It is impossible to separate these two types of managers because it is unfair.

The managers who pay want to gain competitive advantages over those who don't pay or pay less. If they are separated from those managers who refuse to pay, they will loss such advantage. They are not cheating. They just invest more on playing the game. The managers who refuse to pay are still allowed to pay but deserve having some disadvantages.

I have different opinion. I think it is the fairest to evenly mix up all types of managers by random drawing for all competitions. This avoid club level being meaningless.

BTW, I never pay.