1. Among the demands was the call for the imposition of a super-tax on personal fortunes and company profits.

2. Bankers have described the supertax as confirmation of the UK's hostility to finance.

3. Why not opt for a gesture—tariffs, a supertax on the rich—that may only make matters worse?

4. Britain's chancellor imposed a supertax on bankers' bonuses in Britain.

5. Trouble can arise in unexpected places: in 2010 Australia's government tried to impose a mining supertax.