The combination of low Treasury yields and nugatory credit spreads provides an irresistible opportunity for emerging countries to issue lots of cheap debt.
But perhaps in a relative sense British qualms should be seen as nugatory - in that if banking union helps to keep the eurozone from imploding, maybe a bit of single-market messiness is a price worth paying.
Which is why MPs on the PAC want Her Majesty's Revenue and Customs to be more aggressive in challenging the nugatory UK profits and minimal tax liabilities declared in the UK by the likes of Google, Starbucks and Amazon.