I just cannot understand why you have all jumped on Brummie like that, unless there is something overhanging from another board?
Dh and I earn significantly less than 100k and I have no problem with Brummie demanding tax free childcare. Just because someone is wealthier than me doesn't mean I can't see things from their point of view.
Anyway, income is a very poor indication of poverty these days. Take 2 different families:
Family 1: Living in Preston. Earn 30k between them. Family live nearby and thus reduce childcare costs, and the mother works part time. They bought a detached 4 bed house 8 years ago for 90k (would now cost 250k). Their mortage costs 600 per month, childcare of 200pm. After tax they take home about 1900pcm, topped up by tax credits. Of which they have 1100pcm left to cover other expenses.
Family 2: Living in Manchester. Earn 55k per year. No family nearby so paying full childcare costs. Bought a house recently - a 3 bed ex-council semi for 250k with a 100% mortgage. Take home pay after tax 3055pcm. Their childcare costs are 1200pcm and their mortgage is 1700pcm. This would leave them with 155pcm to cover all their other expenses.
The first couple are receiving tax credits, the second not. Is this fair? Probably not, but that isn't because tax credits are a bad idea in principle. Nor is tax deductible childcare a bad idea just because some people will do better out of it than others.