Honesty and Integrity
I believe this is an old story, but one can change the scenario to reflect their cultures moral values. It goes something like this,
Integrity can be lost very quickly, and it's difficult to get it back. If you go back on what you just said as in this situation, you then become a liar. If it's an organisational statement, then it unfortunately also reflects on everybody in that organisation.
So when you check how the voting went for that broken format OOXML you'll see that MDec, Mimos and PIKOM voting yes.
More telling is that it was a very technical standard, for which hundreds of flaws were highlighted within a short time internationally. What kind of impression then does it give to the technical capabilities of these organisations and their members? A lot of questions are raised when your integrity is in doubt.
So do stuff with integrity and honesty. They're values you don't want to lose.
