You've probably never heard of him, but cartoonist David Pope, who goes under the pseudonym Heinrich Hinze, is certainly among the best artists doing political and editorial work in Australia.
The reason you may not recognise his name is that, to my knowledge, his work is done exclusively for trade union publications and other specialist outlets like trade magazines.
He has an uncanny ability to see lateral connections between seemingly unrelated subjects, and bring them to life with a simplicity that belies the seriousness of his intentions.
The result is often, paradoxically, timeless. This cartoon (above) was done at the time of the last federal budget, but retains its currency to this day. I bet readers from other countries would have no trouble in seeing the relevance of this image to their own domestic debates about tax.
You can see much more of his work at the "Scratch! Media" website which carries substantial archives.