OK so your contention is customers will not be resistant to higher prices because the NRST tax will be to blame?
The customers won't like it, but will have to lump it; the 'evil NRST' will take a big part of the blame. There was recently a German guy on one of the FR EU-vote threads bitching about the price-jump when the Euro currency switch was used as cover by the beer companies over there. He still drinks beer, though, at the higher price.