Any UBI should be introduced slowly. In Canada, I would recommend starting at $200 a month.
This will prevent a sudden surge of the “freeloader effect”, which should be pretty predictable if Canada decides to pay everyone $1500 a month. And there will be a lot of jobs that will go unfilled.
Sociologist and economists should be watching the changes to society. As well as the freeloader effect, rents just might increase as poor people have more income, which then means the UBI really isn’t accomplishing much.
If there are negative effects with $200 a month (and I don’t think there will be many), raise payment each year. Allow society to get used to the new change.
In a decade or two, the UBI can reach $1500 a month, which should cover basic expenses for most people. If they want more, they should get a job.
And as the UBI increases its payments, some social programs — and all their bureaucrats and offices — should be cast aside.