Having read the thread now, just picking up on a few things:
Littlebella you say the after school clubs are crap where you live because they only feed the chidren toast. "I suppose they're expecting you to feed 7 year olds a proper meal when you get them home at 6.30pm, half an hour before bedtime never mind that sleep deprivation is one of the major causes of bad behaviour in children".
Well, ok, supper at 7 or later is not ideal, I suppose, but it's what we do with our 7 year old and with his older brother. Tbh I've never seen it as an insurmountable problem to me working and it's never caused huge problems at school. ds2 gets around 11 or more hours sleep and seems fine on this. Mind you, I don't have to wake him up for school till 8.00 am, as I do the school run in the morning. I am lucky that I work locally and have some flexibility. However, even if I had to get him up earlier, getting home from a playclub at 6.30 for supper followed by an 8 - 8 30 bedtime is not too difficult, I'd have thought? Stressful yes, but not impossible.
Also, our after school club allow children to bring in sandwiches/fruit for their tea. We do this, so ds can have healthier, more substantial food. It would be worth asking your after school club if they would allow this. IME many clubs are fine about this, you just have to ask.
As for older children feeling abandoned if you go out to work - doesn't it depend on what they can do when you are not there and (a bit) on how you as a parent present the option to them? If you are negative about it, then it' easier for them to be negative, too.
Again I can only speak from my own experience but my 13 year old son now actively finds out about couses he wants to do while I am at work. Yesterday he presented me with an application form for a cricket course that he had already filled and just wanted me to pay for! Both my sons actually prefer to go on courses and playclubs during some of the school holidays. We've talked about this a lot and they'd honestly rather do the stuff they like than than have me around with them for six weeks constantly at home.
I know all parents and children are different. A good friend of mine has just handed in her notice because her employer for the first time ever wants her to work two weeks of the school holidays. She totally objects to this, even though her children are aged 11 and 14. Her job is a good, well paid, part time one, in an area where jobs are hard to come by but she is willing to sacrifice this. She asked for my opinion as I have always worked for some of the holidays. I tried to show her that IME playclubs and holiday courses are not terrible things to inflict on children, but for her it is an unthinkable intrusion into her family life. Fair enough. It's none of my business anyway