I can speak to that.
We are living in a different time, with zero inflation. The OAS-GIS is indexed quarterly, and the CPP is indexed annually. There's not an exact match, so the CPP might be indexed based on the previous year and how prices have moved--an indexation of, say, 2%. The OAS is indexed quarterly, so maybe at the beginning of that period there was inflation, but for the second, third, and fourth quarters inflation was zero. That will only be caught by CPP the next year. But because OAS is done on a quarterly basis and you have zero inflation, your benefit does not increase. All these benefits are fully indexed to CPI, but not on the same frequency. At the end of the day, the indexation is the same over a period of time.
However, if you take a snapshot of this, the 85-year-old lady you are describing received an increase in her CPP because of the annual indexation for the last 12 months. This increased her income. Normally there would be an increase in the GIS due to inflation, but now there's no increase because there's zero inflation. So you see a reduction in the GIS because there's been an increase in the CPP. That reduction is 50%. It's the example Madam Demers was talking about. So an increase of one dollar in revenue, be it CPP or other, reduces the income-tested benefit.
That's the situation. It's very particular at this time because of the different frequencies of calculation of indexation.