So this is sort of what I had in mind. The top bit would be included in every job posting as a general bit of helpful advice, while the second bit below would be the actual guide that it links to.
This is just a draft. I'd appreciate input, commentary etc etc especially with the red flags bit.





*************************************************************************************
To ensure a positive work experience in South Korea, make sure to do basic research on job standards in Korea before accepting a position!
Follow the link for some basic information about common Korean ESL industry regulations, benchmarks, and red-flags:
[link to actual information]
*************************************************************************************



Visa:
Ensure that your prospective job is appropriate to the type of visa you are applying for. This is the employees responsibility: if you are working on the wrong visa type, *you* run the risk of being fined and deported while your employer may face no repercussions at all.:
D-2: Student Visa: Possible to do part time teaching *only with explicit written permission from university*
E-1: university professor
E-2: Language conversation *only* (ie, no teaching music, PE, Science etc in English) working for a single employer. Not allowed to work as independent contractor.
F-visas: Almost anything goes, job-wise. If you have an F-visa you probably are already aware of everything in this rough guide.
There are many other visas. Most do not allow for ESL teaching.
Here’s the wiki link: https://en.wikipedia.org/wiki/List_of_South_Korean_visas


Compensation:
As of autumn, 2023, minimum wage in South Korea is 9,620 won per hour.
A full time job (40 working hours per week) is not legally permitted to offer a monthly salary of less than 2.01 million won.
Overtime is defined as any amount of hours over 40 which must be paid at 1.5 times hourly rate.
Here’s up-to-date (2022) info related to work hours, breaks, and payment:
https://www.replicon.com/regulation/south-korea/#:~:text=Employers%20who%20employ%20fewer%20than,only%2052%20hours%20a%20week.


*Mandatory* benefits:
If you are on an E-2 visa, these are the benefits that you are guaranteed as a full time worker:

Minimum of 1 paid day off per week.
Maximum of 8 hour work day before overtime applies
30 minute rest break per 4 hours worked.
15 days of annual paid leave (this may include 2nd weekend day, unfortunately).
Public Holidays, depending on the size of workplace. If working for small business, then can be required to work on red days, but will earn 150% wages.
50% contribution to mandatory medicare.
50% contribution to mandatory pension  (4.5% of monthly salary *not* 3.3%)
Paid leave for work-related illness or injury.
Here is link to Korean Employee rights and benefits:
https://content.next.westlaw.com/6-508-2342?transitionType=Default&contextData=(sc.Default)&firstPage=true


***** Benchmark contract:
This is a link to the public school contracts offered to E-2 visa holders in 2021.
This seems like a very reasonable standard to compare your own contract to.
https://www.epik.go.kr:8080/contents.do?contentsNo=54&menuNo=283


Common Red flags in a Contract:



Disclaimer:
This is meant as a helpful guideline and is in no way complete or definitive.
Check Korean labour laws when a dispute arises, as it *always* takes precedent over contractual clauses.

Why would you do that?  It's incorrect.

Even at 209 hours per month, far more than even hakwons, it's 1,914,440, which is less than "over 2 million per month".

https://www.minimumwage.go.kr/english/main.do

2.010580 million, actually.   
https://www.minimumwage.go.kr/english/introduce/minWage.do

But "close enough for government work".