From the other thread, razerfish mentioned that the underlying theory might be something called MMT or Modern Monetary Theory.
Basically, MMT is another name for Chartalism, which is Post-Keynesian theory (yes, that is an actual school).
In general, I think it’s prudent to familiarize yourself with other schools of thought, even other non-mainstream ones, in the event you encounter some of their adherents.
Here are some useful links after I did a google search: