It looks like the conclusion on that page supports my claim.
> Conclusions
The notion, at least, behind the expression "there is honor among thieves" is ancient, and it is expressed (inexactly) by English writers as far back as Daniel Defoe in 1723. A pamphlet published in 1782 describes "there is honour among thieves" as an "adage," so the familiar wording must be considerably older than that date.
The counter-proverb, "there is no honour among thieves" is somewhat younger—at least in Google Books search results, with an exact occurrence in 1828 after earlier instances in which writers denied the assertion that honor did exist among thieves.
I read you as claiming that the idiom used the word "amongst". That wasn't true when the word existed and it still isn't true now.
The concept of honor among thieves has been used in many ways. Whether you emphasize that it's present in certain contexts or that it's absent in other contexts doesn't change the way you refer to it.
Not always true. I've coached people to stay before and they are still at the company. Sometimes they have concerns that actually could be fixed from management. People are complex and have many different reasons for wanting to leave, some fixable some not.
If someone puts in a resignation then sure, let them go. But if they come to you, their manager, and say "I'm thinking about leaving" it's a different situation. They may have a legitimate reason that you can solve to their satisfaction.
