It comes at a problematic point where at 100,000 you also lose your personal allowance. It means that when I received a pay rise from whatever to exactly 100,000 I lost £4000 in tax-free childcare meaning I actually earned less.
Nobody is expected not to use it if they earn below the point it is taken away, it's just an arbitrary tax on parents who earn 100,000, while at the same time a few other paper cuts are piled on.
I know Americans always do tax returns, sounds like a pita for you guys, and I believe until recently you had no choice but to use some sort of service and couldn't DIY it?
Here if you're PAYE (salaries), it's dealt with on your behalf, the tax is deducted before you're paid and you don't have to deal with it, unless you're self employed. It's not necessarily a huge issue, but it's a time cost and that has to have a price, and if you get it wrong, HMRC are notoriously hard and will demand full payment immediately, if you're lucky and they accept your "excuse" (their word), they might let you split it over 3 months.
At this point it's best to make sure you have £10,000+ in savings aside just in case.
I've not had to do a tax return yet, but I've frequently seen tax bills in the tens of thousands from family and friends because their accountant got it wrong, and holds no liability.
I don't think it's as big an issue for me people have taken from my original wording, that's fine, poor choice of words on my part perhaps, but it has certainly been blown out of proportion including some minor jabs at me and (incorrectly) at my political leanings etc. Despite this really all having nothing to do with politics or news and quite clearly as I pointed out at it's direct effect on my family finances.
As the saying goes here in England, "I'm sorry I mentioned it".