Introduce a Wealth Tax for those with more than £10 million in cash assets

Background

Given that the country is short of money and a rise in direct taxes is unlikely, one way to raise more revenue is to introduce a wealth tax. Those who are most able to pay should contribute more. I propose that anyone who has more than £10 million in cash

Additional details

Stop cutting services and benefits for those most in need. There are plenty of very wealthy people in the country that could easily pay more.