The basis of all right-wingery is a monarchic belief in the absolute freedom of privileged individuals and countries to do whatever the fuck they like without responsibility or consequences.

Rules are expedient to the extent that they promote those 'freedoms'.

The order of cause and effect is - start with the power relationships you want, then persuade everyone that the rules that promote those relationships are somehow economically, politically, socially, and even scientifically inviolable.

Greece and Varoufakis are challenging that by saying that the rules and the power they maintain are debatable, and may even be subject to democratic constraints.

Macro is actually a red herring. It may or may not be amenable to rational analysis, but its role here is to promote political persuasion and leverage, not to predict the future.