Even if the Metropolitan Transportation Authority implements far-reaching service cuts that would eliminate entire subway and bus lines and force students to pay to get to school, the agency will still face a $400 million budget gap. Revenue from a payroll tax has apparently come up short, again, the Daily News reports. The new revenue shortfall will make it harder for transit activists to convince the agency to not to implement the service cuts, and according to the tabloid, it raises the possibility that next year's planned fare hikes might be more than the planned increase of 7.5 percent.