I just don't really get it. I've worked a bunch of places, and the only employee memorial I've ever seen was for people lost during 9/11. My current company has a scholarship named after an employee, but that's because the family put up the seed money. It's just not really something that is all that prevalent. Disney can do what they want, of course, and people can ask for what they want, but it's just not something you see companies generally do for good employees, even long term good employees. You recognize their contributions when they retire and thank them for their years of hard work and move on. It's work, not community service. You were paid for your efforts. Even the lighthouse associated with the poor child killed by the alligator is not actually a memorial for the child, but a symbol for the foundation that was formed after.
Maybe I'm just too jaded...