But what does your tax system look like?
Brown/Blair increased NIC by 1% twice to "save the NHS". Rishi has just increased NIC by another 1.25%. So that's 3.25% and still nowhere near enough.
On another thread, teachers are complaining their pay rise isn't funded so there'll be cuts. So how much extra tax would be needed to fund education - another couple of percent?
How about police - everyone wants more constables on the beat. How much does that cost. Another couple of percent?
And so it goes on. A percent or two to "fund" all the different departments and you're soon looking at another 10% or so overall. Do you really think the average Joe Public can afford that or will be willing to pay it?
You can't keep carving away out of the same economy. It'd crash the economy as less money in peoples' pockets means less spending, meaning business closures, meaning unemployment, meaning higher benefits bill, meaning even more tax from the fewer people working!
The real answer is to grow the economy, and that means inward investment, i.e. attracting international firms to locate in Britain, encouraging UK tourism, increased technological development, building new infrastructure, incentivising new factories, etc.
A smaller tax percentage of a bigger economy means more tax revenue. A larger tax percentage of a smaller economy means less tax revenue!