OPEC’s unwillingness to limit its oil output could help usher in a sustained period of low prices and more pain for its members’ budgets, the International Energy Agency said Tuesday. The comments by the Paris-based monitor of energy trends echoed criticism from within and outside the group over a Saudi-led strategy of keeping the taps open to put pressure on higher-cost rivals such as the U.S. Members of the Organization of the Petroleum Exporting Countries including Venezuela, Iran and Algeria are being badly pinched by fallen oil prices and have agitated for production cutbacks to push them back up. Oil producers that aren’t members of the group are complaining as well: On Monday, Omani oil minister Mohammed Bin Hamad Al Rumhy called current oil production levels “irresponsible” and said the group had contributed to low oil prices. “This is a commodity that if you have 1 million barrels a […]