Change Child Benefit cap from £60k sole earner to £100k joint or single income

A single earner of £60k will be on a 40% tax bracket with no child benefit yet 2 parents can earn £43k each at 20% and get full child benefit. Families work extremely hard to enable one of the parents to look after their children during their youngest years rather than a stranger but the government seems to want to make this extremely difficult. There is also very little public Information to inform you that you lose this when you hit £60k meaning you end up in debt to the inland revenue.