"The budget calls for a five-year reallocation of payroll taxes from the Old-Age and Survivors Insurance (OASI) trust fund to the disability fund (DI), starting in January 2016 and ending in December 2020. The plan would increase the payroll tax allocated to DI by 0.9 percentage point, with a corresponding decrease in funds received by OASI. The change would have no overall effect on the longevity of the combined trust funds, which are expected to be exhausted in 2033."