Milwaukee County had a pension plan where people had an option to defer their retirement and when they actually stop working, receive a lump sum and a partially reduced pension. Here's an excerpt from the link-
" "Drop" refers to Deferred Retirement Option Program. Employees who stay on after they are eligible to retire can receive both a lump-sum payout and a (somewhat reduced) monthly retirement benefit. Employees, upon leaving, reach "back" to a prior date when they could have retired. They get a lump sum equal to the total of the monthly pension benefits from that date up until their actual quitting date. The concept was not new in 2001, but Milwaukee County's plan was distinguished because it did not limit the number of years a worker could "drop back." In fact, retirees are routinely dropping back five years or more, with some reaching back 10 or more years.
That has allowed many workers to get lump-sum payments well into six figures.
Former deputy district attorney Jon Reddin, at age 63, collected the largest to date: $976,000, on top of monthly pension checks of $6,070 each."
Ironically, also from the link-
"
July 13-14, 1998: Milwaukee County Human Resources Director Gary Dobbert attends conference session in San Francisco and gets detailed briefing on "backdrop" lump-sum pension programs."
The estimated cost to the county is around $900 Million.