Crazy rich owners no. Competent rich owners - no problem. As long as they don't interfere with the board and managers wishes. I like the Glazer's stand-off approach to United. So far it has not disrupted the youth policy or the acquisition of new talent.
For me, its about their success at developing the image of the club on and off the pitch which I admire. Manchester United's image in Asia is something that City and Chelsea still have a long way to go to match. Obviously this is borne out through superstar players like Beckham and Ronaldo - and they continue to do so with Rooney, Park Ji Sung etc... but fostering success is more than just megabucks deals to get the best manager and the best players, its about making a club so successful with a legacy and a history and a whole generation of followers in tons of countries that ensures the team can afford to stay on top. Were it not for the development of Man United's youth squad in the early nineties - only some of their modern day success would have been possible and they would doubtful have been as lucrative an investment for the Glazer family.
It does seem like some clubs are just rich billionaires toys now. I wonder how long it will be before impatient notions kick in and they start demanding the 'instant reward' they feel they deserve for all their cash. How many managers have we now had at Chelsea? Do you get the feeling that if they don't perform as expected in the next couple of seasons, Abramovic will just sell up through boredom and find a new toy to play with? It'll be interesting to see how megabucks teams with megabucks players cope without their billionaire sugar daddy then. How big is Chelsea internationally? More to the point how big is Manchester City? Do they even sell their shirts outside the UK?

They'd better hope their investors don't bail after a few short lived seasons or those players will be soon flooding to the next club with ker-azy arab money being poured into it.