Walmart does not in any way, shape, or form have an obligation to pass savings directly onto shareholders instead of reinvesting it in customer satisfaction.
Which it does, so it is a completely valid option.
There is absolutely nothing forcing them to pick any particular use for the money. Both uses benefit the company in some way. Both uses are fine. It's not like they're burning it.
>There is absolutely nothing forcing them to pick any particular use for the money.
Except this legal precedent right here: