I was shocked to find that public enterprise employees don't earn much more than high school teachers

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Based on appearances alone, people in public enterprises seem like successful, clean-cut, high earners,
while high school teachers—especially male teachers—often carry an image of being struggling and poor.
But I looked at the actual salary scales, rather than just seeing civil servants claiming they're doing okay by putting a few hundred thousand won into mutual aid associations,
and the two are quite similar. Do they earn a lot of money compared to large corporations for standard daytime roles?
No, they just work shift rotations, so they earn a lot through night shift allowances.
Actually, what I realized after seeing this is:
There aren't that many people who earn a lot of money in Korea.
Professionals, employees at large corporations, landlords, or successful business owners—though since most businesses fail, they are a tiny minority in terms of percentage.
And while you can make money for a short time doing manual labor on-site, it's not something an average person can do for a long time.