For those of us who like facts BTW (source HMRC), :
The 10% of income taxpayers with the largest incomes contribute over 60% of income tax receipts.
In the UK, the threshold for the top 10% of personal income before tax is £59,200
Median is about 30k, the 50th to 90th centiles pay 30% of total tax, and up to the 50th centile less than 10%
So actually half of people here really are barely contributing to OP's childcare anyway.
And before we tell people with children that that's their choice, take into account that single workers in the UK are taxed a little less than EU average, and those with children are taxed a fair whack more than EU average (source OECD)
In the United Kingdom, the average single worker faced a net average tax rate of 23.6% in 2022, compared with the OECD average of 24.6%
Taking into account child related benefits and tax provisions, the employee net average tax rate for an average married worker with two children in the United Kingdom was 18.8% in 2022, which is the 11th highest in the OECD, and compares with 14.1% for the OECD average.