I can't speak for all programs in the department, but for the old age security program, we pay attention to the marginal effective tax rate. We also pay attention to the interaction between provincial programs, which may also have a reduction rate that creates a marginal effective tax rate.
In fact, when we changed the guaranteed income supplement this year, we did engage with provinces and territories to make sure there were no adverse interactions between the programs whereby a client who receives the guaranteed income supplement would have a reduction rate based on additional income, or similarly, that clients may be receiving a reduction rate for their provincial benefits.
I'm actually quite pleased to say that while there was one jurisdiction where there was a potential negative impact, which was the Yukon, the Yukon indicated a will to change their programming to eliminate the negative impact.