Quoting the cost of a bowl of noodles is actually a pretty good indicator of local costs, according to local customs. Quoting the cost of a McDonalds hamburger would be useless, as it costs the same everywhere - hence McDonald's perception as upscale fast food and its inability to penetrate rural towns and cities a la USA.
Whenever Christian-based (or loosely based) schools advertise here - they tend to be flamed and bashed, as they must adhere and demonstrate a higher standard of ethics and morality - although higher pay (a few private airplane toting heretical aside) is NOT in their cards.
Some mainline and evangelical christian organizations that I'm familiar with, typically pull their staff from a mix of long-term missionaries - who form the anchor teaching and administrative staff, and a pool of short-term missionaries. All of the missionaries are supplemented financially from their home churches.
The primary goal is evangelism - in overt or subtle form. Personally, I have no issue with evangelism unless it interferes with the family unit or wider spreading social ills, such as radicalism - which is not limited to Christianity, as we're learning pointedly, these days.
The key to understanding a school and it's philosophy of teaching/influence peddling is meeting the school's head administrators. Then spend time in the teacher's break and lunch/meal areas, where they can unwind and relax.
Youthful teachers may be mature or immature, both in faith or behavior. They're just people, not saints, not gods. They get jealous, frustrated, angry, petty, etc.
It's easy to bash from the outside, without bothering to "look in" - just like stereotyping all chinese as uncouth, spitting, defecating, noisy, discourteous tourists.
So before jumping all over any organization - it would be nice if we could have an unbiased and fair view into various organizations, bars, restaurants, etc - before publicly blacklisting and lambasting them.
There's a very thin line between constructive criticism and bullying and gossip.