The Productivity Commission has again used its annual Trade and Assistance Review to challenge key aspects of the government's economic management, slamming a number of decisions for undermining free trade and investment.

Last year, the PC used the report to attack the government's preferential trade agreement agenda, the secrecy with which the Trans Pacific Partnership had been negotiated and then-trade minister Andrew Robb's wild hyping of the benefits of preferential trade agreements (dubbed "free trade agreements" by the government).