@Olivier5,
Social Democracy is indeed a fairly apt term.
I believe most discussions of these issues involve the very questionable assumption of the existence of a supposedly ideal system of human governance equally adaptable everywhere. I believe a moment's reflection will reveal that to be absurd and contrary to all that we know about life on this planet. Life is competitive, and only the strong survive and reproduce. Cultures, civilizations and systems of governance rise up thrive for a while and then decay and are replaced by others, just as do we in our individual lives. Equilibrium does not occur, either in human history or the workings of nature. The second Law of Thermodynamics has general applicability, even to systems of human governance.
Norway is certainly an example of a very "successful" social democracy. It has a relatively small population; a very pervasive and deep rooted culture, distinct from those even of its Scandinavian neighbors; and huge offshore petroleum deposits which it exploits assiduously to, very prudently, finance its social welfare systems. How "exportable" is that system, and to what extent is it highly dependent on the specific facts present there? I believe this question is too often underestimated and unexamined.
Venezuela is similarly blessed with abundant petroleum resources; more accessible and in vastly greater per capita quantities than those of Norway. Despite this Venezuela is fast descending into poverty, public disorder and chaos under an avowedly Socialist regime.
Norway is not without it's own cultural challenges. I observed this myself during a very pleasant visit to Bergen a few months ago. The cultural tensions involving government efforts to subsidize immigrants are palpable, though most were reluctant to talk about it. How adaptable the Norwegian system proves to under the contemporary remains to be seen.