The experience of Xavi Hernandez is also not anything close to someone like Guardiola. And even in this short time, he has actually been able to win the La Liga title under some extreme conditions. I understand that Barcelona did provide him with some decent amount of money to be honest. But if Barcelona wants more, they will have to spend more. And that is something Barcelona cannot do right now.
Xavi has been with Guardiola. If you look at the games, they have the same philosophy. You have to remember Guardiola takes a long time. He is also building a team, with his long period as coach unfairly comparing Xavi and Guardiola. I think Xavi is quite a genius, he has the potential to have achievements like Pep Guardiola. He still has quite a long time to be a coach at the current age. Regarding players, maybe they have limited funds due to economic circumstances. Even yesterday I heard that they still have some players who have not made the official list in this season's competition.