From A Fading Miracle on NRO Weekend:

Often called “neo-liberals” or “ordo-liberal,s, economists such as Wilhelm Röpke had long criticized Germany’s slide toward collectivism. This, they argued, began when the “Iron Chancellor,” Otto von Bismarck, instituted tariffs in 1878, and ended in the nightmare of Hitler’s war economy.
A passionate anti-Nazi, Röpke fled Germany in 1933. Interestingly, Röpke’s anti-Nazism included powerful critiques of the socialist aspects of the National Socialists’ program. Unlike the Nazi regime, the ordo-liberals believed in free enterprise and markets. The state’s role, they stressed, was to uphold monetary stability, the rule of law, contracts, property rights, and open markets, and to inhibit attempts by businesses to establish cartels and unions to create labor monopolies.