Why is the pay so low in language schools?

Before your recruitment business, you may start by finding me a job with such pay 1000 NTD/hr in Taipei - I look whitey (judging by Taiwanese who often think I’m American: Měiguó rén) - I’m not native English speaker but fluent (110 iBT TOEFL) and have some science/tech teaching experience.

Due to COVID, I’ve even applied for 500 NTD/hr jobs online but didn’t have much success.

ps. I’m looking for part-time and extremely limited hours per week (<10hr/week).