With Barcelona's current financial condition, it is difficult to meet the clause fee requested by Bilbao even though we see on a number of social media fans helping by giving gifts. There are a number of players with quite high salaries at Barcelona so that when the club's income is not balanced it will be much more difficult for Barcelona to keep up. Barcelona management must take several steps to solve the club's financial problems because if this continues it will be very problematic when Barcelona does not win any competition because they will only rely on ticket sales and fees from sponsors. Cutting some of the high salaries of players needs to be considered unless they receive large additional funds from sponsors or other sources.
Cutting the player's salary can indeed be an option for Barcelona if Barcelona wants to make their financial more stable, but it also will not be more effective because some players will certainly not be willing if that happens to those who are already in Barcelona. The only more effective way for Barcelona in terms of making their financial stable is to raise sponsor rates and also by winning large competitions such as La Liga and also the Champions League.