Right now there is a test in place if you want to take your CPP early, a work cessation test: as you read, you either have to stop work for a couple of months or sharply reduce your earnings.
I think it's a bit of a holdover from a time going way back to when we clawed back CPP from those who had continued to have work earnings. The concept, which was coming from the ministers of finance at the federal and provincial-territorial level, was that we wanted to give flexibility to people to continue working and collect the CPP. We wanted to make sure that we were flexible in the arrangements people wanted to have, so this takes away a somewhat arbitrary rule that was forcing decisions upon people. They'd have to stop work for two months in order to collect CPP early. There was no good justification for that.