I see absolutely no problem with this. No scrabbling to pay for food, no spending every red cent on magic equipment just so we can survive (Scrooge gives that shit away, what's he going to do with it?), no sleeping in shitty inns in town (he owns half the goddamn country, he can give us a good deal on housing).
If you can get on his good side, Scrooge McDuck is the perfect boss. He expects hard work, but more importantly, he RESPECTS hard work, and makes sure it's rewarded. Skilled, sensible adventurers are a valuable resource, and a good businessman - and make no mistake, Scrooge is the best there is - preserves and carefully manages his valuable resources. He'd keep the party in wine, women, and silk sheets for as long as they continued to be motivated and effective lackeys... and you'd better fucking believe they'd be motivated, with all the booze and tail they could ever want being just another grand adventure away.