ZURICH (Reuters) – The Swiss Trade Union Federation (SGB) decided on Friday to launch a campaign for a referendum on tapping into the Swiss National Bank’s cash pile to help shore up the national pension scheme. “Due to extraordinarily high profits and negative interest rates, the SNB’s distribution potential has risen sharply. This money belongs to the people,” the SGB said after delegates met to approve the campaign, as Reuters had reported. The SNB has racked up more than 100 billion Swiss francs ($108 billion) in profits during the central bank’s long campaign to restrain the safe-haven Sw…