Singapore has competition, I being one of them. I'm single with NO children. I have no commitments and no ties. I'm want to move for the lifestyle, and the fact it pays better than in NZ is a bonus.
OMG. Do you actually live here yet?

No, you are NOT competition. Being single and having no children is not actually seen as a good thing by many international schools. Single teachers tend to find it harder to settle in, get homesick more often and (because of their lack of commitments, as you just pointed out) are more likely to break contract.
On the other hand, teachers with families have a huge desire to see the school do well - their children are being educated there, after all. They are also more likely to stay longer than one contract as too many moves are unsettling. They tend to settle faster as they need to carve out their family lives and keep a semblance of normality... You see how a school would rather just pay the extra flights (which are only once a contract anyway) and absorb the cost of having a couple of kids in the school? Salaries are not higher for people with children, so the costs in some areas quickly outweigh the benefits. The only schools that prefer to hire young, single teachers are not the types of places most people would want to work (including young, single teachers, ironically) as they pay badly, treat their staff as disposable items and care only about saving money at all costs.
All the schools here are internationally recognised, and since the entire island is smaller by half than most New Zealand cities, the location really shouldn't sway your decision... Lots of people go overseas for the money, and there is money to be made in Singapore. A three year contract is a normal expat contract in many industries, and the money had better be good because Singapore changes on a dime and anything could happen in that length of time here - so you're way off the mark on that point too. The OP has every reason to be thinking about salaries. Do some research and you'll soon see that without a reasonable salary, this place doesn't have much in the way of 'lifestyle'.
The arrogance in your post is shocking. That will kill you in an interview in Asia. I'd be more concerned about than any of the other crap you mentioned.
Hope THAT helps.
