Retirement implies not working in order to earn money to survive. If the Romans in question had to work their farms, they weren’t retired. But if e.g. they were given enough money to buy and keep slaves who did all of the work, then they could fairly be said to have retired.
I am not sure what you normally think of as retirement. Buying a condo in Florida and spending the last few functioning brain cells on bingo?
Retirement implies not working in order to earn money to survive. If the Romans in question had to work their farms, they weren’t retired. But if e.g. they were given enough money to buy and keep slaves who did all of the work, then they could fairly be said to have retired.