WASHINGTON — The architect of the House Republican plan for overhauling Medicare says presidential candidate Newt Gingrich's critical description of the proposal was deeply inaccurate and a gross mischaracterization.Last week Gingrich called Rep. Paul Ryan's (R-Wis.) Medicare proposal "right-wing social engineering." “What you want to have is a system where people voluntarily migrate to better outcomes, better solutions, better options, not one where you suddenly impose it,” he said.