2000 hours a year is normal for most people that work a 9 to 5 job. Koreans are famous for doing more hours per week on average but their efficiency is pretty low. In all honesty they waste probably a third of their time at work doing absolutely nothing. If prison helps them organise their schedules better, more power to them, but to me it looks pretty silly to pay a bunch of money to avoid distractions. You can achieve the same with a bit more discipline, free of charge.


