Seoul apartments were seriously cheap during the Moon Jae-in administration

There isn't much difference between the annual salaries at large corporations then and now, and it was during the COVID era when salary inflation was exploding... Back then, you didn't even need to work for a major corporation; even if you were a married couple of civil servants working 9-to-6, it was a time when you could register ownership of an apartment in a mid-to-high tier area of Seoul with a mortgage.