Imagine you are the chancellor of exchequer. Imagine you face the most politically tempestuous year of your life and that you may not last the next 12 months. You have one budget left to change history. Imagine, in other words, that you are Philip Hammond.

What makes it into your bucket-list budget? Let’s ignore the electoral or parliamentary maths and focus instead on the biggest, boldest, unlikeliest policies.

Start with something to address one of the biggest problems with the tax system — that we raise too much money from income and too little from wealth. A wealth tax might sound radical at first until everyone realises that similar things exist in Switzerland, Norway and Italy. Indeed, these days you seem to hear this idea