MOSCOW—The Russian government slashed its economic forecasts for the next two decades, issuing a dire warning that the oil-fueled growth that has been a foundation of Vladimir Putin ‘s rule is over and there’s nothing likely to take its place, given the country’s poor investment climate and aging infrastructure. The Economy Ministry said it expects growth at an annual rate of 2.5% to 2030, below the global average, meaning Russia’s steady climb up the ranks of global economies in Putin’s early years is likely to reverse. Boosted by high oil prices and reforms following the Soviet collapse, the economy grew at an average rate of 7% in the years before the 2008 global financial crisis. Since he returned to the presidency in 2012, Mr. Putin has called for 5% growth for Russia to catch up with leading global economies, but the latest forecasts say that goal is far out […]