This actually still technically boils down to Trevor’s doing! Being a being of gluttony incarnate he aims to enable as many people as possible, and combined with millennia of amassed wealth (this is a man who toppled kingdoms) and a keen sense for business, he’s able to have his hands in so many different pots for the same goal, and is basically unable to lose. He’s at the top of the chain for nearly every restaurant, storefront, medical centre, or anything else that specifically caters to cheap, quality service for the obese and rapidly-becoming-obese. If you bought a new scooter with fancy oxygen tank holders, chances are he owns that. If you bought a deliciously cheap quintuple decker burger with two sticks of butter jammed between the greasy patties, he owns that too. Just got a bypass? Guess who funds that institute. He’s maybe the only real philanthropist in the universe.