Well, I assume you much have a CRA file to get CERB. If you have a CRA file, you are paying taxes. So residency isn't really meant much.
Now CRA/EI is pretty good a craw backs when you hit certain income level while on the program. One can only hope the same check and balance is applied when everyone files for 2019 taxes.
Also, Trudeau has advised everyone to to electronic deposits. So even more CRA data gathering beyond what they have dug up.
And when this is all over, may be there will be a bunch of auditing jobs from CRA.
If you can't tax the rich, you devalue the money. It worked for the US for 2008 collapse and we are trying it for the 1st time ever in Canada.
The whole pandemic program will cost almost $1T. Doubling Net Debt overnight. Money just doesn't suddenly appears.
We will all be paying for it with inflation. But I just don't see there's another way out.