One can legitimately (within the set of rules we give ourselves as a society) possess and earn a lot of wealth without actually creating most of that value. If all the employees - en masse - could not go any more to work, would the company still be providing that huge amount of value? Probably not. At the end of the chain there is always a group of people creating the value through work. That doesn't mean that the wealth is not legitimately earned even if that person -alone- did not create million times more value.