Switzerland will hold a vote on whether to introduce a basic income for all adults, in a further sign of growing public activism over pay inequality since the financial crisis. A grassroots committee is calling for all adults in Switzerland to receive an unconditional income of 2,500 Swiss francs — about $2,800 — per month from the state, with the aim of providing a financial safety net for the population. Organizers submitted more than the 100,000 signatures needed to call a referendum on Friday and tipped a truckload of 8 million five-cent coins outside the parliament building in Bern, one...