In most countries if you stay long enough and qualify then you become a permanent resident. The sneaky trick that SK is doing with its maximum term of 2 years

In most countries if you stay long enough and qualify then you become a permanent resident. The sneaky trick that SK is doing with its maximum term of 2 years is ensuring that no one on this arrangement will be eligible (which apparently requires residing there for 5 years at least: https://en.wikipedia.org/wiki/Immigration_to_South_Korea https://en.wikipedia.org/wiki/Immigration_to_South_Korea). This makes the program entirely pointless for intended audience, ie. people dead set on living in South Korea (not just have fun for a year).