I was thinking simpler. Just give the decision power to managers, but allow them to use it to reward/celebrate their employees.

I’ve had two credit cards for work in my career. On one I bought a book (one single book). On the other one I bought . . . nothing - not one single thing. But I was required to get it because I once paid for required training on my own card then put in for reimbursement (as I was told to do). Corporate went nuts because I didn’t do it their way - use the company card I didn’t have at the time.