It takes time to get a wage bill down. One of the quickest ways to do it is sell off the people who are going to rot in your senior squad and offer your older players new contracts with slightly less wage. People 30+ normally accept a decrease in wage, not too much but a couple thousand, maybe a couple hundred. I think the majority of the clubs on the game will get minus profit every month and it doesn't help if a club is paying off an outstanding loan, which I think Schalke are..