If you sell kopi for $1 and now you increase price to $1.20. Say your expenses average to $0.80 per cup. Increase gst by 2% at most increase your expenses by $0.016 per cup but you go increase your price by $0.20 this is not profiteering is what?And that's provided that your company is also GST-registered, isn't it?
What if your company isn't (eg the average hawkers)? Does that not mean you can't claim back the GST you've paid your supplier? With GST increase, your cost will increase (need to pay extra $0.09 for every $1 you pay your supplier), who do you think you will eventually pass the extra cost to?
Yes technically it's not compounding, but the price increase is not necessarily due to businessman's profiteering.
