The Neymar example doesn't really work in the context you're using it as it's actually the exact opposite of what you're trying to suggest. Neymar is living proof that if you offer someone enough money they'll sign a contract, even when the club is clearly not as successful/famous. That's what a sugar daddy does for you, and you've just proved my point for me. Cheers.
Neymar wanted to leave to establish himself as the worlds greatest, away from the shadow of Ronaldo and Messi in Spain. Lukaku and Stones both thought they were bigger and better than Everton, adn no amount of money would have kept them here