OBM but it isn;t always a matter of choice - I'm lucky that I have had property in London for many years so reasonable level of mortgage.
My friend who is an IT person whose income hovers around the higher rate band, single mother as her husband ran off leaving her with debts, house sold to pay off debts.
A two bed ex council flat in a not particularly nice but not horrendous area was £195k. Transport into city is terrible which means she struggles to get back in time to pick up her DD from CM's. She has no spare cash after paying CM fees of £50 per day.
Do you really think that its right that the govt who only a few years ago gave her a small tax break on paying her childcare fees, now takes it away.
Of course she could always move even further out - spend more time commuting (already an hour) in order to save money but then she wouldn't be able to rely on her mother (who lives locally) helping out.
This is the kind of people who will suffer - people on lower incomes will get the money back some other way (though if you are working I fail to see how 2 hrs of extra nursery time for 2 yr olds will help), people on much higher incomes will hardly notice.