Speaking as a panelist at a CNBC-chaired International Monetary Fund (IMF) debate in Washington D.C., Summers claimed Europe's economic measures were simply "not working".

The renowned economist also compared Europe's lackluster growth to Japan's stagnation in the mid-1990s. He warned that, like Japan, the region could face years of deflation and "dismal" economic performance if it did not start investing more and reverse some of its current policies.

"What's happening in Europe is not working. What followed in Japan was 15 years of deflation and dismal economic performance, followed by dramatic declines in interest rates – that is the path that Europe is on without a substantial discontinuity in policy," Summers said at the debate.

Summers said Europe, and Germany in particular, should follow recent advice from the IMF to invest in infrastructure projects, which would "pay for itself " by lowering sovereign debt burdens.

However, Germany's Schäuble refuted comparisons with Japan, saying Europe was a "specific" case. "You can't compare (Europe) with Japan, nor with the U.S., to be very frank," he said in response to Summers.

"You have to know the specificities of Europe— on average (Europeans') expenditure for social purposes in relation to GDP is double compared to the U.S., Canada and Australia," he added.

David Fuller's view

Well, that Socialist policy is not working.  In fact, it has not worked for a very long time and Germany is not providing the infrastructure spending that it needs, along with the rest of the EU.  These problems are further complicated by the necessary sanctions against Russia.