To raise  the OAS to help reduce the deficit unfairly presents more working years for those least able to do so for health reasons. That doesn't make a lot of sense. It would make more sense to deny OAS benefits until age 67 for those working full time, or mostly full time.

 Let's also bear in mind that folks who work hard over the years and accumulate a good income can have all or part of the OAS clawed back. So the OAS is not a universal benefit as may be thought.