Denmark, Norway, and I would add Sweden... all relatively small (populations of less than 10 million), homogeneous (at least until their recent opening of doors to refugees), where there was a cultural ethic to abide by the system and not abuse it. Here we have a polyglot population of almost 350 million over a vast highly differentiated geography. It will not work here.
FWIW, I believe the fact that they are all Protestant countries helped them develop into successful states - and like the US, that factor plays a significant role in their downfall (specifically, the negative birthrate/end of families).