I admit, I didn't read all 92 pages of that doc, I just skimmed to the chart at the bottom. I guess you are using "computer occ" value for programmer? If so, there's a lot more interesting things in there than what you pointed out. For example, the lowest scoring "computer occs" on chart 7 are way below that of "administrative occs", as well as high school teachers, service managers, social workers and clergy. Hard to tell, but looks like clerical-other also has higher minimal requirements. Am I missing the real data or misunderstanding that chart? Because frankly, it looks pretty implausible.