Tanzania's umbrella labour union is planning a nationwide peaceful demonstrations to protest the government's decision to hike power tariffs by 18.5 per cent effective 1 January 2011, the body's leadership said. 'As workers we are not convinced with the way the government and the Tanzania Electric Supply Company (TANESCO) decided to increase power tariffs while aware that most of our people are leading miserable lives,' said Nicholas Mgaya, acting secretary general of the Trade Union Congress of Tanzania (TUCTA).