There is no free market though, there are only different forms of capitalism with different levels of market concentration (and labour market exploitation). Let's use Keynes to make my point. He's often portrayed as the last Great Liberal, with his analysis seen as the great defender of the capitalist order. Its through his analysis that the economy can be stabilised and capitalist profit maintained. I was certainly brought up on that logic. What folk ignore is that Keynes was a socialist. Involved with the Fabians, this quote indicated his political preference : "Conservatism is a far greater danger of the near future than a revolutionary socialism". The important point is that Keynes' contribution could be misrepresented as it is not a blueprint to deliver his socialism. It is a blueprint in understanding that we can't rely on microeconomic foundations to explain macroeconomic outcomes. However, if the purpose is to enable economic justice, we certainly then have to go beyond macroeconomic policy.