Every company has a use it it or lose it policy. The state workers use this as a way to boost their retirement pay that WE pay for.
My cousins husband works for a Calif state university (computer professor) and when I brought up this problem about sick days. He was kinda incensed saying he deserved the money. He wasn’t sick mind you but viewed those days as something he deserved.
That is the attitude that will and has bankrupted cites.