At the start of the global financial crisis, there was significant co-operation and co-ordination within the G-20, however, many G-20 countries have since become increasingly inwardly focussed and critical of the policies of other members of the forum. This was particularly so in the aftermath of the implementation of quantitative easing, which had repercussions for capital inflows and currency appreciation in emerging-market countries.
Such robust rules can form a basis for developing more systematic, rulelike policymaking. This rule-like approach does not mean one can know the future or what future policy decisions will be. You often hear policymakers speak of policy as being data dependent, and indeed, it is.