WASHINGTON — The Treasury Department will announce today that most government benefits payments will be made by direct deposit by 2013, the latest in a series of cost-cutting moves by the Obama administration. The change will eliminate about 136 million paper checks sent by the Social Security Administration, Department of Veterans Affairs, Railroad Retirement Board and Office of Personnel Management, and caps years of efforts to cut back on paper and postage costs. The move should cut about $48 million in government postage costs and save taxpayers about $303 million in the first five years after the switch, Treasury said....