The UK is for-real working on simplifying their tax code: <a href="https:&#x2F;&#x2F;www.gov.uk&#x2F;government&#x2F;organisations&#x2F;office-of-tax-simplification" rel="nofollow">https:&#x2F;&#x2F;www.gov.uk&#x2F;government&#x2F;organisations&#x2F;office-of-tax-si...</a><p>At the moment they are trying to harmonize income tax and National Insurance (which is not entirely unlike income tax (especially because it all goes into the same pot), but it has exemptions for various groups which income tax does not (e.g. seniors collecting their pensions). So any change will invariably throw some group under the bus, which is why it&#x27;s politically hard to do.)