Yeah it does. Which specific jobs are you talking about? I think Graeber is good, but "email jobs" is no more descriptive than "counter jobs" or something. Lots of different counters you can sit behind, lots of different emails you can send. We do ourselves a disservice by trying to analyze "the laptop class" or whatever without examples.

I was going to spell this out in initial comment but decided in favor of brevity. By "the amount of surplus labor capitalists are able to extract from labor power in that type of job", I mean that efficient extraction of labor power in some roles can force capitalists to steal less surplus in other roles. For instance, if programmers are paid $200k to save finance firms $1m a year in operational improvements, nonprofits may have to pay their programmers $90k even if they're getting nowhere near $500k of surplus labor out of the deal, because otherwise the programmers can go work for finance firms and make $200k. Lawyer jobs that close billion-dollar mergers or wiggle out of EPA fines make it more expensive to hire a criminal defense attorney. When labor is commoditized, you get something similar to the minimal socially necessary amount of labor that values commodities. So I expect that many high-paid "bullshit jobs" are staffed by labor that could be extracted more efficiently in other roles.

e: on second thought, second paragraph may be bourgeois labor market theory rephrased into LTV. But I think it's obvious that salaries are part of economic base, and social hierarchy is superstructure, not the other way around.