I'm sure the issue, form the employee perspective, is not that some employees have to work on Christmas. It's how those employees are chosen, and how they are compensated. If those are done fairly, then there would be no valid reason to complain. If not, then they have justification, and certainly the right.
-It's "couldn't care less", not "could care less".
-It's "would've", "should've", and "could've", not "would of", "should of", and "could of".
-It's "voila!", not "walla!" (That's right. You've been speaking French all this time.)
-The first word in each sentence should be capitalized.
-A period goes at the end of each sentence.
-Commas are also a good idea, on occasion.