There are so many family friendly employers out there now I don't know why you put up with employers who live in the dark ages.
Either speak to your employer or change jobs. And it’s not a case of switching to something low paid. Stop being so black and white.
I think both PP here are being pretty naive. If you live in a city with lots of childcare options then it might be a lot easier to get a job with good hours, but in lots of smaller towns or rural areas it's just not possible.
Lots of employers will say they're family friendly but in reality they're at liberty to refuse your requests for flexi-time/part-time hours if it doesn't "work for the business." Around here, for example, the biggest industries are hospitality, retail and tourism. All jobs that require shift work, irregular hours/days off, overtime in peak season and less hours in the winter months - they're really not family friendly. You have to fit the needs of the business, not the other way around.
It's very hard to find an employer here who will give you set days off in order to arrange childcare, and it's nigh-on impossible to arrange childcare when you have different days off every week.
Of course you can work in a local city and commute, but then you have the issue of getting home in time for the childminder/nursery pick up, or arranging childcare so you can leave in time to drive to the city and get to work for 9am.
Some people on here seem to think it's as simple as "request different hours" or "get a new job" - it's really not that easy! If I asked my employer for set days I'd be told yes, but in reality I'd be expected to shift around to cover holidays and absences, which just isn't possible when you have children who need looking after and can't afford emergency childcare.