Barcelona problem is related to the bad management and the choice of players and their high wages. They need to reconsider the performance of their players and improve the squad. For example, De Jong can make them get Lewandowski +/- let other players leave or be loaned to reduce the charge..
Being clogged with financial issues will make any coach unable to guarantee any title or even a stable performance of the team.
There are definitely two options that Barcelona must take to improve their finances, maybe the first one I think is from their management side because it is from the directors that this problem arises. they have to be really unambitious in this transfer window if they want to improve their finances by buying players with low fee clauses and selling players with high salary status in their squad. maybe Barcelona should learn from what Maldini and Massara did at AC Milan because they can win the Scudetto even though they are in a financial crisis.