Around £1.3 billion has gone to people unaffected by the crisis, while others suffering catastrophic income losses have missed out on any support at all.
Solicitors believe that up to 13,000 disabled people in the UK have been affected by the change and may be entitled to make a claim to retrieve lost benefit payments.
Countries with such high levels of inequality as the UK have higher levels of ill health, obesity, drug and alcohol addiction and lower levels of trust and educational attainment, says the Equality Trust.
The uncounting of people at the very bottom of income levels and of the hidden wealth of people at the very top means inequality is grossly underreported, says the Tax Justice Network.
Wealth inequality is almost twice as high as income inequality and, having fallen for most of the 20th Century, has increased over the past decade, says the Resolution Foundation.
The Early Years Alliance says tax-free childcare is a regressive policy because parents with more disposable income receive more financial support from government than those with less.