U.S. house prices and rents have been rising for decades, interrupted only by the Great Recession. Rising costs have increased the already considerable burden on low-income people to pay for housing. In 1985, for example, single people who received cash assistance from the federal Supplemental Security Income (SSI) program were paying half of their budgets for rent or a mortgage, according to a new study. Today, housing consumes about two-thirds of their income. The trend is also up, though less dramatically, for families in which one member is getting SSI, with housing expenses growing from 45 percent of the budget to more than half. The maximum monthly SSI benefit is $943 for individuals and $1,415 for couples, and many recipients…