When the Canada Pension Plan was put in place on January 1,1966, it was a relatively simple retirement savings model. Working Canadians started making contributions to the CPP when they turned 18 years of age and continued making those contributions throughout their working life. Those who had contributed could start receiving CPP on retirement, usually at the age of 65. Once an individual was receiving retirement benefits, he or she was not required (or allowed) to make further contributions to the CPP. The CPP retirement benefit for which that individual was eligible therefore could not increase (except for inflationary increases) after that point.