In the UK, I get a little frustrated there is such a focus on an individual's income rather than a family's income - if you consider the tax paid by a pair of w

In the UK, I get a little frustrated there is such a focus on an individual's income rather than a family's income - if you consider the tax paid by a pair of working parents each earning £50k vs a family where 1 person earns 100k and the other does not work, the pair earning £50k each are much better off. (Child tax credits are removed gradually as the higher earner exceeds £50k, as well as the tax bands meaning someone on £100k pays more tax proportionally than someone on £50k.)