I may have misunderstood you, but that's not how roulette works, you don't win the money from the other players but from the house.
You are absolutely right, the max bet on the roulette table helps prevent the martingale system from working and also reduce the variance on house profits. The free drinks keep the player at the table longer etc etc
No you win it from the other gamblers ,where the house acts as the medium of exchange. The house keeps it's comission, the house edge, and the rest of it is distributed through other gamblers.