Wow. Slightly saddened that some of the comments on here have leapt to the rich/poor debate, as I think OP has a really good point.
Full disclosure, I earn 6 figures, and DH also earns 6 figures. We both came from v ordinary backgrounds, my father was always under threat of redundancy, can recall mum getting mop as a christmas present etc, so have seen that side of life etc.
I have worked incredibly hard to get where I am (including frequent all nighters) and putting off having children. That's not to say there aren't less well paid jobs where you work equally as hard, but it is to say that most people (again) in well paid jobs will have worked really hard (at school, uni and when in role) to get there.
At present we are expecting no 2. I work 65-75 hours, plus commute. In a job which I have limited security in (as is common in my industry, but that's the deal). We will need to move house in the next two years as will run out of room, so have done some preliminary looking and, to the posters original point, the option which makes most sense is to move out of the area and take (much less) well paid jobs. If we try and stay in the area, we can get more space, but will probably have to pay for schooling (and yes, I recognize I could send DCs to underperforming schools miles away which we would probably be allocated to, but I choose not to and consider myself lucky to be able to make that choice). Move a little further out (ie 3 hrs commute a day), and probably one of us will need to stop work/try to work locally if we are to see children/each other, with corresponding increase in hours/commute for other.
By far the best option is to buy mortgage free in an area with less oversubscribed schools, near family, and take jobs which (whilst not 9-5) do at least mean with a shorter we see each other and our children.
This situation will only get worse for our children, until the government and businesses take action to be less south east centric, to provide tax breaks for childcare, and to not expect as a matter of routine employees to work 60 plus hours a week on a permanent basis (there are laws in place to prevent this but are not enforced).
The saddest thing is the impact that this is has on women, gender pay and men (in terms of take up of patenrity leave, part time working). It forces couples into choosing one (often the man) as the sole earner, of my (brilliant) school and university friends who now have children, I am the only one working full time at a senior level - its just not worth it.