Good until they start talking about a 'sustainable economy'. They make the assumption (which I believe to be false) that you cannot have sustainability with growth and that things like population must remain static.

They then propose solving it by giving government sole control over money, something which is sure to lead to disaster as politics comes into play. Politicians are the least qualified to decide how to spend money.

Finally, the conspiracy theory hinted at is only one step away from anti-semitic myths about banking...

I am always amazed that people identify government as part of the problem (protecting banks from runs etc) but then propose that government is the solution. Perhaps they mean government by themselves is the solution...