I consider myself to be in this category and also worried.
DH and I were on tax credits until recently, we ran a business that we loved but made very little profit and in the end had to concede it wasn't enough long term. We made about 15k. DH has now retrained and had a job with a 40k salary. I work school hours and earn about 9k a year as we now have to pay all our childcare. That is nearly £50k! I thought we'd feel so much better off but little seems to have changed in terms of disposable income.
Previously we had around 10k a year in tax credits to top us up, mist of the childcare was covered.
We also had free travel to college for our eldest, this is now £700 a year. She also used to get a free breakfast and lunch, and a bursary for books. Books have cost me over £100 this year.
The loss of free dental treatment, prescriptions, the money off school trips.
But the biggest ones is going to be uni, she don't get the full loan anymore and we need to top her up by thousands. And there's two more who also might want to go.
Obviously we won't get the targeted help with bills either.
I know how sneery people are on here about "high earners" moaning about money and I would have been the same before but all I can say is we don't seem to have any more money in our pockets and taking even more tax is going to make me wish we'd never made that lifestyle change in the first place!