The IMF said that countries with ample fiscal space should focus on beefing-up infrastructure, where the rewards could be big. "For countries with low debt and big infrastructure needs (and with idle resources and facing low interest rates), building infrastructure should be the greater priority. For countries with significant risk of fiscal distress, it is unlikely that they could afford to take the chance of going on a borrowing spree, no matter how large the public investment," the report said.