Let's assume for a moment that #MMT is wrong. The IPCC report has given us 12 years to limit the damage we have already done to the climate. The only international time-limited challenge we have faced as a species. In respect to the environment, the market is not self-regulating.

The government has to intervene in our economy. Once we understand that, the aim of our government is to ensure we have a prosperous and sustainable environment. Yet, in a non-MMT perspective, we have valued balanced revenue and spending.

In balancing our budget or limiting our national debt we have allowed sound finance to be prioritised over functional finance. In a society which has little time left to save our environment, our priority should be the environment, not fiscal responsibility.

This is the danger of Labour’s fiscal rule. This limits Labour's ability to pace government spending to the necessary level of financial activity which can bring about the Green New Deal advocated by progressive Democrats in the US.

There is a lot I can get behind in the Labour manifesto, but this ideological link to sound finance is going to be an issue for any future Labour government. Within 12 years, there is little time left for Labour to make this great realisation.