[1] Prior to October 2011, Wieser was Director General for Economic Policy and Financial Markets in the Ministry of Finance, Austria.

[1] Explaining his negotiating role Wieaser has stated:[4] I am something like a marriage counsellor who tries – between two or several partners, if one accepts polygamy – to achieve a common understanding of things and seeks to make sure that perational implementation gets underwayThe EFC/EWG prepares Economic and Financial Affairs Council (ECOFIN) decisions[5] particularly on eurozone affairs, as the informal eurozone bodies were gradually given more official roles.

[6] In 2014, Wieser stated that Europe was having an economic recovery but competitiveness should be strengthened, bank balance sheets should be improved and fiscal deficits reduced.

[8][9] Former Greek minister of finance Yanis Varoufakis has claimed that Wieser holds considerable power within the Eurogroup, stating he "has been part of every policy and every coup that resulted in Greece’s immolation and Europe’s ignominy.

[sic]"[13] Reflecting on the actions of the Troika in an interview with German journalists, Wieser blamed an excessively high minimum wage in Greece for the decrease in employment in the exporting sector.