Today's system of progressive but flawed taxation of income must, they say, be ripped up by its roots.

ECONOMIST: Binning the IRS

Progressive taxation deters our best producers and exacting double taxation against investment income drives capital away.

FORBES: Joseph Stiglitz Reminds Us That Nobel Prizes Are Highly Misleading

Mr Clarke argues that the best way to create "a more progressive taxation regime" is through raising income tax itself.

BBC: people in street