If we were a smart club with a long term plan, then this is exactly what should happen.
We're not though, so Richy will probably leave on a free after we refuse to sell and DCL will lose his value over the next 4-5 years playing for a crap club who constantly chops and changes managers, players and playing styles.
Selling Richy for 75-90M next summer and using the money to reinvest in 3-4 youngish players with high potential should absolutely be the plan. Rinse and repeat with DCL the following season. That's how you rebuild a club.