A treatment of taxation based on considerations of political and economic power in a majority-vote democratic context is the topic of this article. Agents are endowed with gross incomes and have concave von Neumann-Morgenstern utilities for money. Taxation policies are decided by majority vote, but each citizen retains a certain basic right that prevents the majority from arbitrarily expropriating his income. The resulting non-transferable utility cooperative game is analyzed by means of the Harsanyi-Shapley-Nash value.