In Europe, it is entirely common for non-native speakers to teach English. There may be a bias in favour of native speakers, but people accept that non-native teachers are good teachers too. I have met teachers from Poland, Germany, Sweden, Italy and more, all teaching in London. Often, students prefer them because they understand more about English grammar.

I don't really know the ins and outs of how predominantly English is spoken in the Philippines. But if you take the example of Singapore - almost everyone there speaks English. Everything is written in English, everyone speaks to each other in English. So why is it not acceptable for them to teach here?

As for Anglo 'culture' - I just don't see why that matters. Why do they need to learn 'Anglo' culture any more than any other culture? They're far more likely to end up using English with a non-native speaker than with a native speaker anyway, so it would surely do them good to learn to converse with people from all sorts of countries. What the fuck even is 'anglo' culture anyway? What about Hispanic teachers from the US who grew up in a predominantly Spanish speaking neighbourhood? Why are they allowed to teach here but not people from outside the US? I've met gyopos who could speak English, sure, but nowhere near native level - yet they are allowed to teach.

If you can pass IELTS with a band 8 or 9, there is absolutely no reason you can't teach. You obviously know the language to native standard level, even if you're not a native speaker. I'd rather have someone who has had to learn the rules teaching me than a fresh-out-of-college bro who just wants to bang Korean women and drink and wouldn't know a mixed conditional if it smacked him in the face.

PS Good luck saying Ireland has anything to do with 'anglo' culture to an Irish person by the way.