3 I have been trying to find a word to describe someone who routinely abuses their workers, and perhaps even more than that, scorns them and sees them as inferior. My first guess was despot but I think that is more routinely used within the context of political leaders. I appreciate any feedback.
A Wikipedia article contains skilled, unskilled, semi-skilled, non-skilled and highly-skilled, as well as "Obama Immigration Order to Impact Millions, Includes Provisions for High-Skilled Workers".
2 is correct. The democracy is that of multiple workers, so workers is plural. Because of that, the apostrophe applies to the plural form and is therefore after the s. If the democracy was the "property" of a single worker, then it would be that worker's democracy.
The man who coined the term knowledge workers differentiated them from manual workers. Management guru Peter Drucker coined the term "knowledge worker." In his 1969 book, The Age of Discontinuity, Drucker differentiates knowledge workers from manual workers and insists that new industries will employ mostly knowledge workers.
5 There are about 10-12 co-workers who directly report to me in office. It's a private company but of very large size. They are Junior to me in terms of experience and also are below me in Organisation hierarchy. Also I am their manager/boss who is responsible for their annual appraisals in company.
In English, there is no single umbrella term systematically used for workers employed by the government (unlike the word "fonctionnaire" in French or the terms "funcionario" and "funcionario público" in Spanish). The various terms that may be used are: public/civil servant, public official, senior/minor [government] official, state employee, government/public worker/employee, functionary. But ...