It seems to me then your definition of "diseconomy" is pretty arbitrary - I mean, do you include private profits of the owners? Presumably not.. but why not? What's the difference between renter raking in profit, between CEO having bonuses and golden parachutes, and between a bureaucrat creating useless work for himself? Aren't all these diseconomies? And if you accept that, then eventually whole human existence becomes one big "diseconomy"..
To me, "diseconomy of scale" is a weird concept, and I think it's because it actually has to be normative. This is unlike "economy of scale", which is well-grounded; if I want to make one car, it's not efficient to build a production line first, but for million cars, it can be. So when something is subject to "economy of scale", it is because there are more possible economic solutions; however, I fail to see how something could be (in the physical, and non-normative, sense) subject to "diseconomy of scale" - surely you could in that case just duplicate the original small-scale process as needed (in other words, why would the corresponding "reduction of possible solutions" happen?).
I actually did, but I don't think it disagrees with what I am saying - that it is a normative concept. In other words, some other form of human organization doesn't have to suffer from the same problems.
Let me put it yet differently. If you fail to utilize economies of scale, nobody will profit. However, if "diseconomies of scale" do exist, then it's because someone profits from these. From the perspective of that person, it's not "diseconomy". I mean, you cannot use the Pareto-efficiency to say that everybody would be better off without "diseconomy", and so it cannot be a positivistic claim.
And a little aside - public organizations are often inefficient because there are private companies profiting from them.
To me, "diseconomy of scale" is a weird concept, and I think it's because it actually has to be normative. This is unlike "economy of scale", which is well-grounded; if I want to make one car, it's not efficient to build a production line first, but for million cars, it can be. So when something is subject to "economy of scale", it is because there are more possible economic solutions; however, I fail to see how something could be (in the physical, and non-normative, sense) subject to "diseconomy of scale" - surely you could in that case just duplicate the original small-scale process as needed (in other words, why would the corresponding "reduction of possible solutions" happen?).