Barcelona should definitely sell players who are not doing well with the squad. But the problem is that Barcelona do not have enough funds. Barcelona will need to buy new players if they sell old players. Barcelona are unable to add new talented players to the squad due to insufficient funds. Perhaps this is the reason why Barcelona management is not deciding to sell old players.
The only reason Barcelona is in such bad shape is the financial crisis. Xavi could have built a stronger squad if not for the financial crisis and would have been able to strengthen the Barcelona team as well. Xavi is failing to stabilize this team only because of financial crisis.
You can always find an excuse for bad results, but in my opinion, the financial crisis did not prevent Barcelona from becoming La Liga champions. What has changed this season, and who do you think should be sold? Xavi has already said that they can sell Lewandowski, I understand what he is talking about, Barcelona has problems in attack, but perhaps the reason is not only Lewandowski, maybe the strategy that Xavi chooses also matters? Because he puts a lot of emphasis on defense, and in this case it’s difficult to expect the team to score a lot.
This is actually true, Xavi still managed the players in his team when they won the league last season and he didn't complain about the financial situation of the team, and this season they were unable to win any trophy and a lot of complains came up, yes excuses are a result of not winning trophies but I think Xabi should have asked for more time instead of the excuses he's giving and considering his suggestion to sell Lewandowski next season may be to solve the problem of defense won't help the team in my personal opinion because lewandowski happens to be the highest goal scorer of the team selling him to solve the problem of defense will leave the attacking force empty because they will find it difficult to get goals.