During the antisemitic purge of 1968 Łaski had to leave Poland and moved to Austria, where he worked for the rest of his life and was widely recognized as a major contributor to Post-Keynesian economics.

[1][2] During World War II, Łaski was a member of Gwardia Ludowa, a Polish communist partizan formation, and a participant of the underground resistance.

In this capacity he supervised research and teaching and invited Michał Kalecki, one of the most prominent Polish economists, to give courses at the SGPiS.

At the same time, Łaski lectured at the INS and, after its closure, at the University for Social Sciences at the Central Committee of the Polish United Workers' Party (Wyższa Szkoła Nauk Społecznych przy KC PZPR – WSNS).

In 1971, Łaski was appointed full professor at the Johannes Kepler University of Linz and started work as research associate at The Vienna Institute for International Economic Studies (wiiw)).

In 1990 Łaski also served as an official advisor to the acting Polish minister Jerzy Osiatyński, head of the Central Planning Office.

According to his perception at that time, the sources of inflationary pressures were to be found in the mistakes of the central planner, his unwillingness to learn from the errors of the past, and the inadequate discipline of managers and workers of socialist enterprises.

At that time, Łaski had not yet put into question the ability of the central planner to gather unbiased information and set up physically consistent plans.

Among other topics, he analyzed the effects of a one-time reduction of the capital-output ratio on the short- and long-term proportions in the growth process.

The book was considered a classical work on the growth theory in socialism, was used as a textbook at Polish universities, and was translated into the Czech language.

One – though not the only – reason for these attacks was the intellectual autonomy of the circle which contradicted the authoritarian claims of the system, even if Kalecki's associates took a definitely pro-socialist stance.

After being appointed to chair the economics department at the Johannes Kepler University Linz Łaski broadened his research and teaching activities.

On the other hand, he reexamined Marx's theory and also took part in the discussion on transformation of labor values into prices of production, which sparked up again.

Further topics of his research at that time were the problems of national accounting, and comparisons of consumption volumes between the East and the West, particularly the comparability of price indices in a market and a centrally planned economy.

From the 1970s onwards, Łaski had also been in close research collaboration with Josef Steindl and the Indian post-Keynesian economist Amit Bhaduri.

He criticized the supply side measures of the "Washington Consensus" proposed and enforced by various international organizations by way of a “shock therapy”, i.e. the quickest possible liberalization and privatization.

It was not an easy task, because global economics remained dominated by the hard neoliberal paradigm and Kalecki's work did not fit well within that current.

Jacek Rostowski, who at that time worked with Finance Minister Leszek Balcerowicz, replied to Łaski's opinion, accusing him of blatant methodological errors in his analysis.

Together with Włodzimierz Brus, Łaski wrote From Marx to the Market, a book which offered substantial analysis of the capitalist reforms currently taking place in Eastern Europe.

Gospodarka kapitalistyczna bez bezrobocia [Lectures on macroeconomics: capitalist economy without unemployment], is the fruit of the last years of Łaski's life.