This is really a matter of opinion in at least two ways. First, you have to decide who it is that is creating “most of our economic pie” and second, you have to determine who is getting how much of that pie relative to what they deserve. Neither of these can be answered very objectively.
My own view would be that I disagree with the statement. I suppose that the statement is meant to imply that workers create most of the economic pie and do not get as much of the pie as they should. I am not at all sure that this is true.
Mainly, this is because I do not know for sure that the workers are creating most of the pie. When a worker goes to a factory and produces a certain amount of goods, can we be sure that the worker is more responsible than the factory owner for creating those goods? Of course, the goods would never have been made were it not for the worker. But it is equally true that the worker would not have had the materials or the machinery to use to make the good had it not been for the owner.
Therefore, I cannot really determine who is more responsible for our economic pie. Therefore, I cannot say that the workers are getting less of the pie than they deserve.