Since at least 2012 until March 2015 he was the chief economic adviser to Syriza. Syriza leader Alexis Tsipras leads a coalition government (Cabinet Tsipras) since the election on 25 January 2015. In February, Milios proposed a scheme to kick start struggling European economies. It involved the European Central Bank buying debt from Euro zone countries. It would hold the debt until the countries Gross domestic product (GDP) rose to five times its value. ("GDP-linked bond")