I'm a parent with one child at childminder and another on the way, and I cringe at the thought of how little our amazing childminder must earn for one of the hardest jobs -and longest days- around. Before I had our DC, when I heard friends complaining about how much their childcare cost, I used to be sad on behalf of their children. My view then was 'Why wouldn't you want to pay a reasonable sum for quality care - are you saying looking after your child isn't as important as whatever you do to earn money for an hour?' 
I kept my mouth shut (for once...) luckily - I can see now how my lovely friends, who of course care for their kids, just really struggle to pay this, mortgage, bills, living costs etc. A few have given up work to retrain as childminders as it's the only way to care for their own kids and earn something - their old jobs weren't even covering travel and childcare. Some were happy to do this, but at least one really mourned her old job (teaching) which she absolutely loved.
So joruth is totally right: squaring the circle is what's needed and unfortunately, that can't be done by individual parents or by childminders - it's a state role. We all know how important early years are, and nobody needs this support forever. As a society, we need to support parents, children, and those who care for them, whether we plan to have kids ourselves or not - we'll all be relying on these toddlers when we're a few decades down the line and using the NHS, home helps etc. What goes around comes around.
Does Mumsnet campaign on this one? And if not, how do we get one started?