If you check the situation very well you will understand that everything is just all about money. If a club has a lot of money, it will be able to buy any kind of coach they want and as well as by quality players to enable them win trophies. But if a club is in financial problems, they will likely not be able to buy any good players or sign good coach and as well they will remain in their financial problem because they will not win trophies that comes with monetary reward.
And that very much you were referring to, PSG had more quality than Barcelona because they were more financially stable and that was why they want and added a whooping $50 million dollars to their portfolio. So dismissing Xavi Hernandez and not serving the financial crisis will not bring any positive results to Barcelona in order to content with Real Madrid this season.
For a team, money is a very important factor for them, how money can change things in an instant. For example, a financial crisis experienced by a club will force them to do everything that ultimately hinders the development of their game, so don't be surprised when a team experiences financial problems, their game will decline. Because management's focus is not only on developing achievements, but their focus will be divided on solving their problems.
In terms of recruiting players, this will also be very influential, because they no longer have or will find it very difficult to bring in good players because these players have very high costs to pay for. One of the reasons Barcelona sold Messi was also their financial factor, so they had to let go of a player who had been their mainstay and it was only for money.