Didn't you see when Barcelona played against Madrid without Lewandowski? Are Barcelona players dependent on Lewa? I don't think so, even without Lewandowski in the squad it won't affect the performance. Hansi Flick understands the club's needs very well and regeneration has been going on for a long time. So despite the financial problems, Barcelona still has loyal and quality players that no other team in Europe has this season.
A treble is possible for Barcelona when they're in this tough prime. They have proven to everyone to be the best club in Laliga this season. Barcelona headcoach, Hansi Flick is comfortable in Barcelona, he's putting arrangements for the club to sit at the top. Barcelona don't depend on Robert Lewandowski for anything solid to win a game this season. For goodness sake, they have their rare gem, Lamine Yamal and also having Raphinha in the frontline. These two players knows how to execute their talents and will always come out winning matches.
The fact that the many victories achieved by Barcelona this season do not only depend on 1 player but involve their entire squad to contribute to doing their best besides their coach Hansi Flick is extraordinary in building a strong strategy and making the players perform optimally, so money is not a problem for Barcelona as long as they have a coach who has brilliant ideas to perform optimally like this season.