The troika has doubts about Greek projections for a primary surplus this year and next and has begun the process of discussing with Athens the contents of the 2014 budget, which Greece's lenders believe contains several areas that need closer inspection.

High-ranking Finance Ministry sources said that while the representatives of the European Commission, European Central Bank and International Monetary Fund agree that Greece will produce a primary surplus at the end of the year, they think it will be minimal. The troika is also skeptical about Greek projections for a primary surplus of 1.5 percent of GDP at the end of next year.

It is thought that one of the reasons Greece's lenders are downplaying the possibility of Athens producing a sizable surplus is that they are alarmed by the debate in Greece about how this amount will be allocated and whether social spending could be increased.