Where I lived, the local PD Union got a town meeting article passed, that then was adopted by the Legislature as a home rule petition, that retired officers in good standing could work details.
IIRC there is a limit as to what they can make (remember the Lynnfield retiree that had the balls to file for unemployment on top of his pension after he maxed out on detail hours?)
He worked as a full time Police Officer for the Town of Lynnfield for 32 years. Following his retirement Hartley continued to work Police details for 19 years.
(
Retired Lynnfield policeman's benefits renewed as task force works on municipal unemployment changes )
I doubt that the retirees,as much as they want to keep biting the apple are going to want to go thru a whole bunch of additional hoop jumping to keep the detail work
Now, full disclosure, my Dad was a Reserve Officer, he worked nights and weekends, the 4th of July parade ( where do you think we got all the fireworks we took to Marshfield after Dad got home) and he worked details when they fell to him when there were no FT Officers who wanted them. He turned down FT appointment 3 times and after that he was forced to give the gig up, but by then he had transitioned from Electrician to Teacher, but in the early years of his teaching career, when he took a substantial pay cut, the PT PD work helped keep the finances at the house in the green woods steady until my Mom returned to the workforce in 1972 after being out of the workforce for 16 years minding the house and raising children.