Important for those interested in MMT. It is a must-read if British or interested in the UK affairs.
Richard Murphy takes Jonathan Portes (and Simon Wren-Lewis) to task for betraying Labor and the left, while misrepresenting MMT.
The issues that MMT addresses in terms of political economy are social, political and economic, as well as cultural and institutional. A lot of different expertise needs to be brought to bear in addition to theoretical economists. Academic economists don't own this debate. Neither do financial professionals. While both these areas of expertise are required, they are not the only necessary ones. Given the broad context, many inputs are relevant in addition.
One of these areas is the so-called Green New Deal. The issues involved are fundamentally economic but they are also fundamentally social as an existential threat and fundamentally political in that a political solution is required. Moreover, it's a huge engineering problem, since the energy system is involved. It's also a global challenge that in which all will have to cooperate.
Any viable solution will require changing institutional arrangements, e.g., legal requirements, and it will also require a cultural shift that involves mass education, since the low-hanging fruit is conservation in an environment where consumption is promoted. It is a huge undertaking, which is a big reason that it is a hot potato that few are brave enough to pick up — not to mention, smart enough.
What MMT has to offer in particular is the knowledge that the only constraint on currency sovereigns addressing issue of public purpose is availability of real resources. The financial constraint is inflation and inflation is a consequence of resource scarcity relative to demand. Governments can address this by controlling demand through taxation or increasing availability of real resources through public investment.
This being a finite world there are physical limits. Knowledge is potentially unlimited, however, limited only the ability to tap potential. Ignorance limits potential, and willful ignorance and dissimulation are culpable.
See also
Labour’s chief economic adviser [James Meadway] confirms it is committed to the thinking that will deliver yet more austerity (6 Aug 2018)
* Demand is the term that economists use to describe the ability and willingness of buyers to purchase a product or service. …
This general idea of demand is often called notional demand, which is composed of both latent demand and effective demand.
Even if a buyer needs or would be willing to purchase a particular product or service, he cannot do so if he lacks the necessary funds or if he does not know about that product or service. This portion of market demand is called latent demand.
Effective demand is a representation of the actual amount of goods or services that buyers are purchasing in a given market. Effective demand is the difference between notional demand and latent demand. Effective demand is a reflection of the extent to which buyers' income, perceptions and needs combine to result in an actual purchase rather than a mere desire to purchase.