but I am sure that you are happy for your DD to be if it from the money raised and the things bought for the kids and I am sure you would be the first person to complain if the school wasn’t able to afford those things.
See that in itself makes me feel the guilt and annoyance that all manipulative, passive aggressive communications from our PTA do.
Firstly you absolutely have no idea who would or wouldn’t be first to complain. But if my school couldn’t afford books, I’d blame the government, not some poor person who didn’t have time to be on the PTA or who didn’t want to because the felt intimidated or pissed off by this exact attitude.
Secondly volunteering for a school or community is about helping others. If you are going to give people a hard time for benefiting from it because they didn’t help, it’s not really very community-spirited is it? You might as well just only do things for your own DC because no one else’s DC deserves it because they didn’t help 
We supposedly all support and care about people with anxiety, asd, mh issues, caring duties and many other things that can make life hard. But if you find pta pressure offputting, you’re fair game for this kind of manipulative, martyrish attack. THAT is why ptas have the reputation they do.
I have never joined the PTA because I am a massive introvert, a radical feminist and disagree with most other parents on most issues. I would not fit in, I would find meetings very stressful and work and childcare issues also mean I wouldn’t be able to turn up for everything.
But I give money, make cakes, donate my specific skills when needed, and donate educational materials that I have through my business. I am pretty sure The financial value of what I’ve donated is at least equivalent to that of a pta member. But it’s freely given. I wouldn’t say to someone who’s never donated anything “oh well you’re happy for YOUR child to benefit so where’s YOUR contribution?” That would be totally missing the point of giving what you want to and feel able to for everyone’s benefit.
We are supposed to have state-funded education. It is not a failing for anyone to not do anything for their Dc school, whether through lack of time, lack of money, personal issues or just disinclination.