Share your insights or perspective on the financial matter presented in the input.

Why do some companies offer 401k retirement plans?
One important thing that hasn't been mentioned here is that the vast majority of companies have eventually eliminated their Company provided Pension Plans and replaced it with a 401K with some degree of matching.  There is a cost advantage to doing this as companies no longer have to maintain or work to maintain a 100% vested pension plan.  This takes a great burden off them.  They also don't have to manage the pension/annuity that the retirement benefit entails.