In Lojze Peterle's cabinet, he served as Vice President of the Government for Economic Coordination from 1990 to 1991 (as a member of the Slovenian Social Democratic Union).
In the late 1990s and early 2000s, he came back to the public life as a strong critic of Slovenia's membership in the European Union and NATO.
In the mid-2000s, he engaged in frequent and virulent polemics with the younger generation of Slovenian liberal and neo-liberal economists (Mičo Mrkaić, Jože P. Damijan, Sašo Polanec, Igor Masten, Janez Šušteršič).
He was a member of the European Academy of Sciences and Arts and received the Golden Order of Freedom of the Republic of Slovenia.
[1] Mencinger appeared in Boris Malagurski's documentary film The Weight of Chains, where he talked about the effects of Slovenia joining the European Union.