Simon - I didn't do any homework nor do I have the information to do so. I merely reported what I was charged and what I was told. Factually, with no embellishment. I didn't use the word or even the sense "gouging" - you did. Nor did I make any accusations. Please don't put words in my mouth.
Now I don't know what is the correct conclusion to draw from this, but the bottom line is that a commodity that they are still able to import has gone up by 1/3 and when I asked why, I was told that it was because of the rise in "GST". Only when I pointed out that the increase in GST produced a cost increase of slightly over 1% was there a vague reference to the cost of shipping having gone up because there was still an embargo on certain cheeses. I asked whether stilton was still embargoed and the answer was "no". At which point the assistant concerned busied herself with another customer and didn't speak to me again. It may not be relevant, but I am pretty sure she initially thought I was a tourist.
What to do with prices when there is a small increase in taxation is indeed a problem. It isn't practicable and usually isn't possible to raise prices by 1.023%. Businesses have to raise some prices by more and not raise others - choosing which prices and how much is tricky. I know several businesses which have chosen to absorb the extra cost and not pass it on at all, at least for the time being, though for them general price increases will have to come sooner than they would have done. But rises of 33% on individual commodities are hard to justify.
Amanda - there are GST inspectors going around the country right now because (they say) that many businesses are using the excuse of the increase in GST to impose unwarranted price hikes. It is an acknowledged problem. That this should be happening is hardly surprising, as it happens anywhere when there is a change in tax rates or currency (look at what happened in Britain when decimal currency was introduced). I don't know that the inspectors have any legal powers to do anything about it, mind.
Diane - of bigger concern to me and other diabetics would be the high fat content of cheese. But I only consume small quantities.