If someone who is 50 pays in for 10 years, they would still have the full benefit from the CPP. They would have the number of years they contributed to the CPP enhancement as well, and, as the minister outlined, there are a whole number of measures that have been taken by the government to support new retirees or seniors on the GIS top-up, depending on their family situation, such as whether they have children, student assistance, the Canada child benefit, and so forth.
On September 19th, 2016. See this statement in context.