Postage increased to 26 cents

I bought many stamp labels for 25 cents (which was the postage previously). With the increase in GST, the postage increased to 26 cents.

I enquired with Singapore Post. What should I do with the current labels?

Their reply: go to a post office, change the labels to 26 cents and pay the difference.

It seems to be quite inconsiderate of Singapore Post. They could have replied, "we will continue to accept the 25 cents label and absorb the difference in GST".

I hope that businesses in Singapore, especially those that are making good profits, can be considerate! Anyway, it probably cost Singapore Post more than 1 cent to replace the labels!