That strategy may have worked when Roman Abramovich owned Chelsea but not anymore. Since Tuchel’s departure the club has faced huge down fall in performance even more than what seemed to be the main problem. Chelsea made a huge mistake letting almost all the experienced players leave the club in one transfer window leaving just the new incomings who are yet to understand the league and the tensity to play every premier league game. What did they expect would happen?
You can forget about the times of Abramovich - then too many different things coincided that simply cannot happen now. The greatest coach + huge investments + not so much competition + Chelsea rose from the bottom so even less progress would be a rise for them. Now you can spend a billion and remain at the same level because competitors spend comparable amounts. But I agree that what has been happening in Chelsea over the last two seasons is simply anomalous.