Well that really depends on a) whether someone (including you) wants or needs ditches (farming irrigation? undertaker? dog hiding bone?) and b) the amount of time required to produce an article under the normal conditions of production, and with the average degree of skill and intensity prevalent at the time. If someone really wants a ton of ditches, and you can dig faster and deeper than anyone else, is your labor more valuable? As programmers we should hope so.
I don't mean to sidetrack the conversation but let's not make sweeping statements of fact without thinking about them!