Tax system and government budget in general are very deliberate system of smoke and mirrors designed to obfuscate how the money is spent. You are paying income tax, but your employee is paying payroll tax for you, is buying health insurance to avoid tax that would have to pay if that money was given to you. You are paying part of corporate tax indirectly, paying various tariffs sales taxes etc.

There should be only property tax and income tax, and the person paying the tax should be able to choose how to spend that money. Maybe you don't care and will let your congressmen to handle it, but maybe you would change your money to go to NASA or and then the government won't be able to spend so much on a pointless war or on building a stadium.

Unfortunately if your employer pays for private health insurance, HMRC says that is a taxable benefit and you still pay tax. The more insidious part is how the government makes employers pay a hidden 15% national insurance tax that needs to be paid on top of the tax on your salary.