You can’t solve one problem and at the same time create another, because you won’t be able to do anything good for the team, but will only make the situation worse. Perhaps by selling De Jong you will be able to cover some of the debts, but at the same time the team will have a problematic position in which they will not have a good performer and this will lead to the fact that the final results for the season will be worse if the player remained in his position. So the problem needs to be solved with an integrated approach, for example, not trying to sell someone from the team, but limiting new transfers and trying to achieve better results.
The problem is that Barcelona is not satisfied with just being left behind by Real Madrid so they have the ambition to continue adding players because they want to appear capable, but in reality this club is on the edge of a financial cliff. De Jong doesn't want to leave because Barcelona still has a debt to him.
Even though with the current squad, Barcelona still has a chance as long as Hansi Flick is given full trust to ensure the current squad is worth maintaining. However, Laporta and Barcelona fans raved in front of the media about their desire to bring in Williams. Imagine that after the Euros, these rumors continue to become demands that Laporta seems obliged to fulfill. Forcing the loan back? Rather than borrowing, there are 2 options, namely selling the player or staying with the current squad and giving up the ambition to bring in Williams.