Riders get slapped with fare hikes — while these guys ride the gravy train. The Metropolitan Transportation Authority’s top earner last year raked in a budget-busting $344,147 in overtime — on top of his $117,499 salary, according to data released Tuesday by the Empire Center fiscal-watchdog group. While delays on the Long Island Rail Road hit a 19-year high in 2018, chief measurement operator Thomas Caputo brought home a fat $461,646 paycheck — more than anyone else at the agency, and $164,027 more than he earned the year before. And yet the MTA couldn’t even explain how many hours Caputo...