Preckwinkle's one day of subbing qualified him to become a participant in the state teachers pension fund, allowing him to pick up 16 years of previous union work and nearly five more years since he joined. He's 59, and at age 60 he'll be eligible for a state pension based on the four-highest consecutive years of his last 10 years of work. His paycheck fluctuates as a union lobbyist, but pension records show his earnings in the last school year were at least $245,000.