In my country as far as I know the government doesn't set the educational standards for VISAs. It issues VISAs according to skills shortages. If there are not enough qualified people for a job an employer can petition to get a VISA. The hired person must meet the laws of the trade or association they are working in.
A doctor must meet the licensing standards for example. I may see a legitimate case such South Korea requiring degrees. There are ALOT! of unemployed people with degrees. I suppose alot of us are from countries with governments that give employers more leniency to choose who think is appropriate.
If the rules are to protect it own people it makes sense. On the other hand an employer may want to choose a teacher with less education yet able to perform good teaching at and above minimum standard. This would give the employer an opportunity to hire a less educated teacher at a lower price. An 'overeducated' teacher may have salary needs that exceed his budget...Wal-Mart Economics
Their government maybe limiting their choices
