The rest of that quote -- "... as long as they pay their taxes" -- is less well remembered.
In 2011, Cameron's coalition passed legislation exempting UK-based corporations from income tax on overseas earnings; a move described by commentator George Monbiot as a "corporate coup d'etat."
Research published by ActionAid showed that 98 out of 100 companies on the FTSE 100 index used offshore subsidiaries, with more registered in Jersey and the Cayman Islands than in India and China.
And it has long been a rite of passage for newly-minted Britons, from Formula One drivers to musicians to self-made millionaires, to shift their riches to Switzerland, Monaco or Jersey with the public raising little more than an eyebrow in reproach. Research by the Guardian newspaper last year revealed how Cameron's own father had built a considerable family fortune by running a legal network of offshore investment funds. Cameron and other members of his family declined to comment on the report.
Yet that situation may be changing, with campaign groups such as UK Uncut stirring up populist anger against corporate tax avoidance and politicians now scrambling to get on the bandwagon, while celebrity tax-dodging schemes have joined sex and drugs scandals as tabloid staples.
Recent exposure of the legal tax avoidance strategies of Google and Amazon saw executives from both companies summoned for scrutiny by the UK's parliamentary public accounts committee where lawmaker Margaret Hodge told Google Vice President Matt Brittin: "You are a company that says you do no evil. And I think that you do do evil."
In the U.S., meanwhile, Apple CEO Tim Cook was summoned to appear on Capitol Hill after a Senate investigation found the company paid taxes in the U.S. of 2% on worldwide income of $74 billion.
Accusing the head of one of the world's biggest companies of "exploiting an absurdity," committee chairman Sen. Carl Levin made the connection between tax avoidance and efforts to cut the US deficit, and delivered a message that ought to resonate with taxpayers anywhere in the world.
"Because of those cuts, children across the country won't get early education. Needy seniors will go without meals. Fighter jets sit idle on tarmacs because our military lacks the funding to keep pilots trained," said Levin.
"The question each of us should ask today is this: Shouldn't we close unjustified tax loopholes, and dedicate the revenue to educating our children, protecting our nation and building its future?"