YANBU
If you don't have friends/family to help out, and so are paying for FT childcare Mon-Fri, the costs are inevitably a high proportion of most peoples wages.
When I first went back to work just over 10 years ago, I was paying £70 a week for my DS to go to a childminder. It was very cheap, but that was just as well because there is no other way I would have managed on my then salary of £1200 a month which had to cover all my bills & mortgage....
When I was last paying for FT childcare in the school hols last year, it was £250-300 a week for my 2 DSs...so not far short of your £1400, but thankfully only for 13 weeks a year.
It has been a struggle to keep going for the last 10 years, and for the first few until DC were at school it was hard to see much benefit in terms of finances - and I now have a fairly well paid job!
I would have loved some form of subsidised childcare, particularly something like a work based creche/nursery when they were babies, both because I would have got to spend more time with them travelling to & from work, & of course from the financial point of view.