There are still a few real-world tests the Diverted Profits Tax or "Google Tax" will have to face before the government can claim it's among the toughest in the world.
Transfer pricing is a common form of legal tax avoidance, and it's costing governments millions.
A landmark decision by the European Commission ordering Apple to pay €13 billion in tax sends a tough message to other multinationals.
The reelected Coalition government will be forced to confront multinational tax avoidance more effectively or suffer the revenue problems.
Loading companies with excessive, tax deductible debt is a commonly used by multinationals to avoid tax - so why has the government ignored it?