Tedious rules just allow the bureaucracy to put their foot on the door of good and honest labor. In countries where occupational licensing is not a norm for mediocre level jobs, people tend to work on more than one job at a time. This is particularly helpful if the occupation is seasonal or affected by season.

Not to mention that this also allows for a more flexible work schedule for some, if they have the option of switching. Giving them more time to spend with their families.