Recently I approached my manager to approve my 4 days leave (Paid Time Off). He said "Let's make it 3 days and take sick leave on the 4th day". He does this every time I apply for more than 2 days leave. His justification is that since Paid Time off (PTO) can be carried forward to next calendar year, why waste it when other types of leave are available.
We also have a payout policy for PTO's, so he makes his justification look more legitimate by quoting this also. (I am not sure about payout of sick leave. I'll update once I check my policies tomorrow.).
While I don't see any disadvantage for me to apply the leaves as he suggested, it is beyond my understanding what's in it for him?