You can dance without a lawyer
Note: I do not work in retail.
If you want to have a strike, it doesn't make sense to hold it when the store isn't doing a lot of business anyway. Holding them hostage when they expect to make millions in sales is a far better time.
Can't we just turn Congress off and then turn it back on again?
english is my first language. i'm 29. i'm an HR professional and have a masters degree in labor economics. the reason i've been posting the way i've been posting is to try and get others to challenge your own ideas about what unions are, what a strike is, and what it means to live in a free market. if i sound like i'm being obtuse, it is only because you lack the ability to understand these issues from a bigger picture perspective.
if i ran a business, and a worker told me they weren't willing to work the hours i needed them to, i would terminate their employment. i'd be okay with that, because that's how the free market operates.
I used "contract" as a general term. Should not have. Most all employers lay out what is expected of the employee. Rules of conduct, hours to work, schedules, etc.
The Walmart employees most likely knew they would have to work on holidays. Heck, some businesses hire extra temps to cover the holidays demands placed by consumers.