Why do you think it is that, not just the governing party, but, as far as I can see, all of our political parties keep referring to "taxpayers' money"?
It's habit, varian, it's Thatcher's pronouncement that 'there's no such thing as state money, only taxpayer's money' and it's the fact that few people have bothered to trace the source of the money in the economy.
It's also a massively convenient political cover for not increasing, or even cutting, state expenditure for political purposes. Few people argue with the concept of 'taxpayer's money because they believe that that is how the state gets its revenue so they accept ludicrous concepts such as 'austerity' without question.
But the few who have painstakingly examined and analysed government accounting and the law relating to government spending and its relationship to the Bank of England have concluded that without a doubt, government spending comes before taxation and that spending is not dependent on tax revenues.
No need to read it all, just the introduction or conclusion, which, as in all good essays, say the same thing..
www.ucl.ac.uk/bartlett/public-purpose/sites/bartlett_public_purpose/files/the_self-financing_state_an_institutional_analysis_of_government_expenditure_revenue_collection_and_debt_issuance_operations_in_the_united_kingdom.pdf
I have searched and searched but I haven't found critique of this paper; let alone one which disputes its findings.
In the past two decades the government has 'created' and issued some £900billion of money through quantitative easing; the purchase of treasury bonds on the bond market to release money into the economy. It has had little appreciable adverse effect on the domestic economy; in fact, during the covid crisis it kept the economy afloat . It didn't come from the tax payer and it doesn't have to be repaid by 'the taxpayer' because it wasn't borrowed, it was created.
In fact, the government has always created money into the economy because if the amount the economy had was finite individuals' share of it would become smaller and smaller as the population increases and as people spent it, or stashed it away, or invested it, overseas.
Ironically, for those who wish to cling to the 'taxation funds spending' myth, the more money the state creates into the economy, the more it will get back via taxation...