On the scale of tax avoidance from Martin Wolf
Brad Setser of the Council on Foreign Relations shows that US corporations report seven times as much profit in small tax havens (Bermuda, the British Caribbean, Ireland, Luxembourg, Netherlands, Singapore and Switzerland) as in six big economies (China, France, Germany, India, Italy and Japan). This is ludicrous.
And putting tax avoidance in perspective,
A 2015 study by the IMF calculated that base erosion and profit shifting reduced long-run annual revenue in OECD countries by about $450bn (1 per cent of gross domestic product) and in non-OECD countries by slightly over $200bn (1.3 per cent of GDP). These are significant figures in the context of a tax that raised an average of only 2.9 per cent of GDP in 2016 in OECD countries and just 2 per cent in the US.