As definitions, I think these may work...
Types of workers:
- Bureaucrats just do the job they are told to do*
- Professionals practice craft, to do their job as well as possible
- Intellectuals look beyond their job, to see a larger significance, which can result in poor performance as well as breakthroughs
- Academic jobs may not be relevant to everyday life
- Public jobs are relevant to the society
- Private jobs are relevant inside an organization
* OMG, you MUST read this essay "On the Phenomenon of Bullshit Jobs"! Excerpt:
But rather than allowing a massive reduction of working hours to free the world’s population to pursue their own projects, pleasures, visions, and ideas, we have seen the ballooning not even so much of the “service” sector as of the administrative sector, up to and including the creation of whole new industries like financial services or telemarketing, or the unprecedented expansion of sectors like corporate law, academic and health administration, human resources, and public relations. And these numbers do not even reflect on all those people whose job is to provide administrative, technical, or security support for these industries, or for that matter the whole host of ancillary industries (dog-washers, all-night pizza deliverymen) that only exist because everyone else is spending so much of their time working in all the other ones.
These are what I propose to call “bullshit jobs.”
It’s as if someone were out there making up pointless jobs just for the sake of keeping us all working. And here, precisely, lies the mystery. In capitalism, this is precisely what is not supposed to happen.