Among the issues in dispute is a two-tier pay scale that would give new hires less pay, vacation and sick leave than veteran workers for 8 1/2 years, said Bob Fisher, airline division representative for the Teamsters and a former United mechanic. Though the starting wage varies, it would be "in the low $20s" per hour for new hires and it would take them more than eight years to get to the top tier of $46.15 per hour, Fisher said.