For me, Bayern Munich is more of a team that doesn't spend a lot of money on player transfers and they're doing the right thing with that. But German teams are generally economical with transfers, which I think is a good thing, other leagues should also take this as a role model.
I definitely agree with that. In general i would also say that german clubs are handling their money very reasonably. There are a few exceptions to that like FC Schalke that still has debts of around 150 Million € but they are also on a good way to get rid of those debts step after step. Dortmund was also almost broke like 15 years ago or so, but they also learned from that but are now a financially healthy club.
The total opposite can be seen in Spain. Barca has debts of 1,3 Billion € thats why they had to sell their TV rights, their Merchandise brand and others stuff which brought them around 600 Million or so, but instead of using that money to pay back a part of their debts they want to spend a big part of it for new players like Lewandowski. It really seems that Barca has learned absolutely nothing and Real also has more than 600 Million € of debts.