Samaras's comments came as prominent Greek think-tank IOBE warned the economy may suffer a small contraction this year even though the recession will bottom out.
That is a more pessimistic view than that held by Samaras's government, which expects the 183 billion euro economy to pull out of recession this year and expand by 0.6 percent.
"There is a climate of waiting and fatigue in the economy which could entail risks," said IOBE head Nikos Vettas. "There is a lack of dynamism in investment and structural reforms."
"The level of investment is still anaemic as is the rate of increase in exports," he said.
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IOBE also warned of growing political risk as Samaras's government remains locked in protracted negotiations with the "troika" of European Commission, European Central Bank and IMF lenders and faces pressure from its leftist rivals.
"Talks with the troika face delays," Vettas said.
"There must be a minimum of political consensus on the course the country must follow, both among political parties and social partners, for the economy to get on the path of irreversible growth."
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