Really? When? (not saying you're wrong Apognophos, just curious)
I know you didn't direct this question at me, but I remember as far back as 20 years ago slips were being passed around in my hall for the local assembly hall project. It was the same drill. Write down how much you think you can contribute. The slips would be passed down the rows and an attendant would walk by to pick up the slips. It was supposed to be anonymous and you were instructed not to write your name on it. The justification for this was that HQ needed this info for budgeting purposes.