In Rebuilding the World Trading System, Andrew Stoeckel explains that arguing for a rules-based system, as the G20 does, is just hollow words if you do not also insist on a domestic transparency institution to assess what is in the national interest. It is the only way the rules will be complied with.
A proper domestic transparency process identifies what is in the national interest, informs and educates the government and the public, exposes narrow vested interests and weakens their influence, and helps build coalitions for reform. It leads to a more predictable policy environment, encouraging investment.