Minnesota’s debt to its workers’ retirement system has soared by $33.4 billion, or $6,000 for every resident, courtesy of accounting rules, Bloomberg News reported yesterday. The jump caused the finances of Minnesota’s pensions to erode more than any other state’s last year as accounting standards seek to prevent governments from using overly optimistic assumptions to minimize what they owe public employees decades from now. Because of changes in actuarial math, Minnesota in 2016 reported having just 53 percent of what it needed to cover promised benefits, down from 80 percent a year earlier, transforming it from one of the best funded state systems to the seventh worst, according to data compiled by Bloomberg. The latest reckoning won’t force Minnesota to pump more taxpayer money into its pensions, nor does it put retirees’ pension checks in any jeopardy. But it underscores the long-term financial pressure facing governments such as Minnesota, New Jersey and Illinois that have been left with massive shortfalls after years of failing to make adequate contributions to their retirement systems. The Governmental Accounting Standards Board’s rules, ushered in after the last recession, were intended to address concern that state and city pensions were understating the scale of their obligations by counting on steady investment gains even after they run out of cash — and no longer have money to invest.