My wife and dad were visiting me for the first time (dad on a visitor visa, wife on SOWP). I was also returning with them and had a valid work permit and visa. We had to wait in line for 5 hours because no visa officer was available to examine/interview everyone (there were over 50 people in the line). After a long wait, we were taken from the queue to another section of the airport and told to sit down for another hour. Then, at random, an office staff member (who obviously wasn't an immigration officer) took everyone's landing documents and passports, sat down in front of his computer, printed everyone's work/study permits, and handed them out like movie tickets. No document verifications, no checks, no questions, nothing.