Have you mit heard of the Crown lands?
The Crown Estate is a collection of lands and holdings in the United Kingdom belonging to the British monarch as a corporation sole,
The Crown Estate is one of the largest property managers in the United Kingdom, administering property worth £14.1 billion
Out of the revenue, the royal family gets only a small amount.
They are highly profitable to the UK.
...and let them pay tax on that small amount. You know the crown chases down the tax on every last television set.
Don't get me wrong. Income taxes need to be removed completely anywhere in the world. They're used to oppress people while the wealthy hide their money in foundations like Bill Gates' and the Clintons who use their tax-deduction foundation to attack Americans while Lois Lerner prevented Tea Party organizations from filing as non-profits.