I guess I think it will be used to lower the age at which the govt expects a parent to work, so instead of the current 5, it will become 3 in the long run, and parents will face - use the free 25 hours or lose your benefits.
Frankly, I don't really see any problem with that. Kids start school at 4 these days. They get nursery provision at 3. The state is, ironically, already paying some people to stay at home... just not families with a tax contribution. Why would someone with children at school fulltime want to rely on the state 100%? You can already work part-time and still receive benefits to top that salary up to higher than it would be were you not in work at all, so if the kids are part-time educated anyway, why not look for something you can combine with that? And realistically, all the state can require is that you be actively seeking/available for work, as opposed to exempt from that requirement due to family responsibilities. In a world where there just aren't enough jobs, you can't force employment, anyway. I do think educational opportunities - for the parent - should also be in the mix, though. Encouraging aspirations for all the family could only be a good thing.
It used to be that parents on benefits with kids didn't need to work until they were 12. It does seem reasonable that that limit was reduced. I don't think mothers of tiny children should be forced into minimum wage jobs and their kids sent to whatever childcare they can find before they can properly communicate, but after 3 I don't see a huge problem or detriment to the kids or family as a whole, if lifelong unemployment is the alternative. In fact, the opposite. And 25 hours of free childcare could really help some people break out of the poverty trap, couldn't it? (Not sure of the figures on that, but I would imagine so.)
I think the free childcare suggestion is a good one, really. It benefits every working parent and I hope it materialises.