Darling, you bastard

[Sysman]

The Government will also continue to defend the tax system robustly against challenges under EU law.

Could this be for when EU law upholds human rights?

[Moscow Mule]

Protecting tax revenues
5.93 The vast majority of business and individual taxpayers in the UK comply with their tax obligations. By contrast, avoidance of tax by a minority leads to distortion in competitive markets, unfairness between individuals and pressure on the public finances. The Government will continue to support the compliant majority while responding to avoidance and fraud with timely and targeted action. The Government will also continue to defend the tax system robustly against challenges under EU law.

They are really going after avoidance in the paragraphs around this one.