We qualify for Child Tax Credits but never claimed them as I feel we are well enough off without and there are a lot more deserving cases. Child Benefit goes straight into a bank account for “the future”. These are two benefits which could be improved by some/better means testing.
Universal benefits are important in avoiding the poverty traps and in improving take-up. All that happens is the richer people who can claim them pay more tax to cover the cost – give with one hand and take away with the other.
Means testing is expensive, reduces take up in groups that need the money and leads to situations where you get very high marginal tax rates – the poverty trap. This is where you increase your earned income and thus go over the thereshold for benefits thus actually reducing your total take home income.
It is right that some benefits are means tested but it is also right that some are not.