I was chatting with a friend about the shortage of labor everywhere and mentioned that I thought the pandemic, and the increased pressures/demands/irritations led to a significant number of older workers who were close enough to retirement to call it a day permanently. A guy who has a couple Tim Hortons, and another fellow with a hardware store agreed, telling me that they lost their older semi-retired casual workers during/after the pandemic. These people realized that they really could retire and didn't need to work a bit to keep busy, they could be busy just doing things they enjoyed. The work experience became less enjoyable and wasn't financially necessary so they stopped. It's what I did.
The CBC has a somewhat different take, blaming it on strictly a demographic shift, but I still think there has to be a catalyst for quitting.
"Boomers are exiting the workforce in droves, leaving more job vacancies than there are people to fill them"