This random dude makes $1200/mo. I don't know what the average is. Maybe he is set for life, but it's only been really big for a couple of days, and I'd imagine he's not quite yet, and certainly not as set as he could be.
AFAIK, a good fresh graduate can make from $600 to $800/month (of course, depends on multiple factors: what he can do, experience, school, type of company, English, etc).
That "random dude" got a Master's degree in Korea, so his salary is reasonable I think.
http://www.bbc.co.uk/news/world-asia-23497561