> Why should we pay (with our taxes) for poor kiwis who can't afford a house?

Why pay taxes at all for a country you're not citizen of? /s

Seriously now, it's because you live there. Their government makes the rules, you decided to live there and, by extension, decided to follow their rules.

> I mean, yeah, Labour party is in power in NZ at the moment, hence such policies like 'Let's increase salaries to poor workers, let's give them houses, let's increase maternity leave etc.'. The problem is that somebody has to pay for that

And, given which democratically elected government is in power, it's their right to choose how to spend their money.