To be honest I was overstating it somewhat, so you are right that they won't just collapse! But when you think the money they have put into transfers themselves, the companies they own that supply so much sponsorship money and wages etc, it's unbelievable. And whereas the club would't collapse, it would be one major upheaval. They need to be successful in Europe to be really considered one of the real super powers in football though. They may be a world power financially, but at the very heart of football is success and recognition, and similar to how Chelsea where before they won in europe, there is always that something major lacking. PSG have the same issue. They won't be considered on the same vein as teams like Real Madrid, Juvenus, Bayern Munich, Liverpool, Manchester United, Milan and Barcelona unless they make a splash in Europe. And Pep knows that more than anyone. They may not even be afterwards, not sure if Chelsea are really seen as being part of that group either.
Anyway, this isn't really relevant. The initial point was that as long as they are there as owners, they will carry on winning!