How much direct involvement do Proncipals have in how a PTO spends it's money?

Most of our meetings consist of our principal presenting a laundry list (mostly wish-list, luxury type items) and us handing over the money. Many memebers feel unconfortable nay-saying her requests or asking to table a request long enough for discussion or thought.

Is this the way PTO's go or are we unusual. If not how have other PTO's handled this?