Not that I want the Monarchy abolished (it serves as a very useful RESET button for Parliament), but perhaps she could disolve this parliament and appoint those 5 dragons from Dragon's Den to run the country.
They know how to make money and avoid getting into debt.
And they have enough money that minor corruptions from the expenses accounts will be unlikely.
Mind you the greedy buggers will want 51% of Great Britain Ltd to do the job.