Sure. Why don't I take a crack at it and others can complement.
We'll start with the youngest. Given the fact that the implementation period for this CPP enhancement starts in 2019 and leads up to 2025, it's really over a period of 40 years to 50 years that you see this improvement and maturing of the benefits. Someone who is 22, for instance, is at a good age to benefit from the majority of this enhancement. The idea is that this enhancement is really about improving the income replacement for future generations. A lot of this has to do, of course, with concerns about retirement plans, defined benefit plans, shifting out of workplaces, and the efficiency of having a CPP and being able to expand the CPP and the portability of it and so forth. If you're 22, you stand to benefit for almost the maturity, if not the maturity, over that period of time.
For someone who is 55, you will be able to contribute starting in 2019, and as it has been conveyed here, you will get out of it what you put into it in terms of a certain return and a certain benefit. Having said that, the amount that the person of 55 years will receive, the majority of the CPP payment that they get will be on the basis of the base CPP, because the enhanced CPP will not have accumulated as much income replacement for...given the fact that the person will have contributed for, I would say, less than about five years or so. It will depend on the age they retire and whether they want to delay their retirement and so forth.
For someone who is 64 years old who is retiring next year, it's a different situation. This is a person who will qualify for CPP, the normal age being 65, in their next year. So the CPP enhancement will be for younger generations. For that person, however, when you think of the total support that's being provided by the government, you have to look at it through the lens of the OAS, the move of OAS from 67 years to 65 years, the GIS support and top-up, depending on the income that the senior will be generating, and the broader package of middle-income tax cuts and so forth and where they stand there.
Often, for those who are 55 years or 64 years, you look at the support structure that exists now. There is a certain benefit that someone at 55 will get from the enhancement, but really it's about younger generations.