Voluntary tax is a misnomer. Tax is never voluntary. I do not think we should put to much analysis into this 'voluntary tax' proposal. It is more kind of play from the Conservatives: Hey, guess, what we do think the taxation is high enough. But feel free to pay more if you want to. So, the intention was not to increase taxation per se. Of course, I did notice that the Socialist prime minister Jonas Gahr Store, a jellylike and spineless persona, criticized the initiative. If he were a 'Real' socialist, he would gladly give away his 8 million fortune to Society and his fellow comrades. We deserve the politicians we elect is guess.