In the past, they managed to get a lot of players from Dortmund. Even a Bayern Munich legend like Lewandowski has Borussia Dortmund in his past. Borussia Dortmund is one of the world's leading teams in finding great players. Bayern can take this side of them as an example.
Bayern was only getting a player from dortmund this season. I meant bayern can't hijack more players from dortmund. That's a strategy that owned by people. It's not only him, remember about mario gotze was also going to the bayern after he has been starting his season with dortmund.
Bayern sees it as a strategy to raid its opponent. That will also make dortmund has less good player to compete with bayern. that will make dortmund will not able to compete with bayern in bundesliga. That strategy was working so well.
It can be seen from how bayern was able winning bundesliga for 11 times in a row. I guess that if dortmund will be trying so hard to chase the new talented player.
Madrid has bought one of its best player. Bayern is also getting so many great players from various clubs. Dortmund will feel so hard in competing with bayern for bundesliga title next season. No doubt if people were calling bundesliga as farmer league.
A league that owned by bayern.