This is kind of the opposite end of the spectrum when you compare businesses in New Zealand to businesses in Malaysia. Businesses here place a lot of trust in customers and they are not out to take your money. I am sure there are businesses here that does the opposite but my experiences so far are that they don't take your money unnecessarily.
If one walked into a post office or post shop as they are called here, you could just help yourself to all the stationery, envelopes and what have you without having to pay on the spot. Often I have taken envelopes, written on them, went to the counter to buy a stamp and I have to tell the lady at the counter that I am also paying for the envelope because she had not included the envelope in the bill. How weird is that?
Once we were going to pave our backyard with pebbles. So we went to the local Mitre-10 to buy pebbles. I wanted enough pebbles to fill a 4 square meter area. Mitre-10 sold the pebbles I wanted in small bags and it would take quite a few bags to fill that area. So I enquired if they had bigger bags or how I could buy larger quantity. Instead of taking my business, they told me to contact their supplier and said I will be better off buying from their supplier who could also include delivery with the price. They gave me the name of the supplier, the phone number and the likely cost!
Last Friday, as I was walking along Lambton Quay, my shoes gave way. I had a meeting to catch and I had 10 minutes to spare. I went to the nearest cobbler and asked him if he could get it fixed. He said it would take him 2 hours, for he needs the glue to cure and could not do it sooner. So, I told him I needed a quick fix and did not have 2 hours. He took my shoe, placed some glue on the soles and nailed it in and took him all of 5 minutes. When he was done, I asked him how much I owed him for that. His reply was "if I can't guarantee it will stay, I can't charge you mate". It is now about a week of walking around in these shoes that could not be guaranteed by the cobbler and it is still as good as new.