Others, like some of the followers of the Modern Monetary Theory (MMT) school, have argued that a region with its own currency cannot have a balance-of-payments crisis because there exists a mechanism, the TARGET2 system, that ensures that Eurozone member countries can always fund their current account deficits.[17][18] These authors do not claim that the current account imbalances in the Eurozone are irrelevant but simply that a currency union cannot have a balance of payments crisis proper.[19] Some authors tackling the crisis from an MMT perspective have claimed that those authors who are denoting the crisis as a 'balance of payments crisis' are changing the meaning of the term.[18][20]