Its not like the monarchy in UK executes any of the political power they supposedly have so whats the point in spending a lot of money changing something that wont change anything?
And the royal family isnt paid for by the public there upkeep is generated by their estates etc unless you are suggesting nationalisation of their properties (a bit like theft if you suggested doing it to any other rich family)

We are called a democracy but we are not who voted for May to be priminister for instance the ongoing strecht out brexit another?