> saying that this is a
desirable property of an economic system seems like an inhumane and, if taken to extremes, systemically dysfunctional position to take.
You have it backwards. The problem with simplicity is that your options for a PC become Performance, Mainstream and Economy. If Economy would have been sufficient except for the storage, sorry, you'll have to pay +$300 for Mainstream (which also has a faster processor and more memory) even though faster storage by itself would only have been +$100.
There is efficiency in not paying for what you don't need, but it has intrinsic complexity. Or you can just buy Performance, not have to worry about anything, but pay +$800.
Having the simple options available is good because some people value time more than money. Having the complex options available is good because some people value money more than time (or can make a complex decision in a small amount of time).
Having said that, the charges for checked bags are still ridiculous, but only because the fees exceed the airlines' cost for carrying the bags by such a large amount. Fortunately they're likely to be destroyed by the price comparison sites now listing the fees next to the ticket price, which should reintroduce price competition for the checked bag fee and either get the fee reduced/eliminated or benefit the customer by giving those who don't need to check a bag a disproportionate discount.
Or some enterprising airline will realize they can profit from selling the empty space in their planes not being used for checked bags to someone like FedEx to carry packages. Then FedEx will realize they can open a storefront in the airport and charge less than the airlines to ship your luggage and you'll be able to pay FedEx $15 to pay the airline $10 to check your bag, instead of paying the airline $30. Then the airlines will just charge $14.