On coaches with speciality and with level 5, 6, 7 - I would not see 50k wage as an extreme - without other investments.
You can imagine that if you want to erase momentally investment during bidding which is on current system (600k-2,2M), these money have to be spent by other way and this other way is on your suggestion a wage...
..this can create great demand from lower leagues, because they will be now capable to bid on that too, that means even stronger wage bidwar...
In this context is current system genious, in my opinion