IMF chief joins calls for big tech firms to pay more tax

Christine Lagarde says governments must address corporation taxation concerns

The managing director of the International Monetary Fund has joined the growing clamour to further tax tech firms Google, Facebook and Amazon as part of a wider review of "outdated" global corporation tax rules.

In a speech in Washington, Christine Lagarde said governments must react to growing concerns that digital companies pay little tax in most countries where they operate, which denyies exchequers vital funds for public services and welfare.