At the time, we did think about whether it would be prudent to ask employers to provide employees' social insurance numbers so that we could match them up with CERB recipients. There were basically three reasons that we thought we could not do that, and you've referenced at least one of them.
The IT build to do that was going to be significant, so we would have had to delay the implementation of the CEWS, the wage subsidy. That was one factor: how long the delay would be at a time when people were anxious to receive money to keep employees on strength.
The second was the burden that it would place on the businesses to be able to generate that information for us and send it to us in a way that was useful in a timely manner. At that time, there was a consideration of how much of a burden we wanted to place on the businesses in order for them to be eligible for this relief.
I think the third factor that was in our minds was that we knew we would have a capacity, even if we couldn't do the match right up front, to come back later. We've always said that a part of our integrity plan on this issue was to do whatever verification we could up front in the context of what was feasible, but knowing that we'd have an opportunity to come back after the fact and compare the information to make sure that the right people got the money.