the problem is that the system literally completely cuts the claimant off. they have to apply for WTC, which can take weeks if not months. their housing/council tax benefit gets cut off and again, weeks if not months to sort out.
on WTC, you lose most if not all council tax benefit. that alone is an extra £1000/annum even for most A band homes. you also lose much housing benefit. in many cities, that's another £5000-£6000/annum, from gross earnings.
ever seen threads on here from people who experience a tax credit fuck up?
the TCO stops their tax credit payments. just like that.
until the cock up is sorted out, which can take months.
people on WTC lose free school dinners, free prescriptions and dental care.
basically, the problem, other than childcare, is that low-incomes are taxed WAY too much.
and the tax credits system needs revision.
and benefits need to be graduated in relation to income, not just 'you're working, you're on your own.'