I'm also a Class Rep and the ONLY WAY a PTA can work is if they have the right attitude and sort out things that people can easily be part of. In my view if someone's reason is simply "I can't be bothered" then that is something I accept with a smile.
Just because I have time and can be bothered doesn't mean everyone else does.
We now have an option for people to donate £xx per year so they don't feel obliged to help out at very twatty fetes, these things make a lot of people's teeth itch.
Many companies now will not allow match funding for schools. Schools get a budget and spend it accordingly, and though PTA fundraising is an excellent way to improve facilities, its often not targeted at specifics.
The year that we had a target in mind, with specific items on the 'wish list' was the year that everyone happily got mucked in.
As far as people giving up their time, whether its for a fundraising event of for in class 'clubs' then you work with what you get, you don't get angry, upset, and you certainly don't say 'well I manage it so why can't you?' because that's unfair and puts people's noses out of joint. Our PTA chairman works full time, doesn't often stop until 8pm, then she works on PTA stuff, and she never has a second to herself... now don't get me wrong, I applaud her effort and martyrdom, but that's HER thing, not mine and I refuse to feel apologetic for it.