We need more evidence-based politics! And randomized control trials can help to provide this evidence.
Some countries have realised the need for such evidence and push ahead: the UK Cabinet Office is hiring four researchers to join their Behavioural Insights Team! ("The Behavioural Insights Team (more commonly referred to as the Nudge Unit) was set up in 2010 to help apply behavioural economics and behavioural psychology to public policy in the UK.")
While I do not want to see you running off to Old Blighty, I'd like to see more of this happening here! And, this goes without saying, I know that there are a great number of colleagues, me included, who like to be involved in such RCTs and (economic) policy.