Sounds like you need a better designed toilet. Good low flow toilets do exist.
We replaced the old 3.5 gallons per flush toilet in our house with a new Kohler 1.28gpf unit and it flushes and clears the bowl just fine - no worse than the previous toilet with about 1/3rd the water use.
One of the best things you can do in a house is replace "early post-ban" toilets with modern ones, the very first low-flow toilets were absolutely ... shit.
It depends very much on the country, for example The Netherlands is a poop shelf design country, but Belgium isn't. No idea what's the reason behind it.
