In Greece the populists didn't take power in the same ways but it is disingenuous to pretend they didn't exist and exert power as a result of the crisis. To call New Democracy -- the party that took power after the crisis -- "not populist" is a mis-reading of history, I think. They campaigned on fear of illegal immigrants, after all. And the second biggest party is SYRIZA -- which is definitely populist -- and which didn't even exist until the crisis destroyed PASOK. And by 2015 SYRIZA's clearly populist platform was enough to take it power in Greece.
One of the themes of Tooze's book isn't that the consequences were immediate. Sure, it took 6-7 years for SYRIZA to get to power in Greece. But that is still a direct consequence of the crisis.