Worked for a telco, but long since retired. We had the contract to support the US Navy's telecom requirements on Ford Island, Hawaii. Big bucks.
The technical manager was told his services were no longer required. He punched out full retirement. A month later the company was in a panic. The contract required a specific set of technical expertise that could not be found elsewhere. Bottom line -- He came back with a 30% boost in pay, He got to keep his lump sum payout and they set the close on years of service to the date of severance forcing the company to pay him yet again in the future.