Yes.
In terms of hierarchies, most businesses I've worked for have been
1. General workers
2. Team lead/most experienced worker
3. Supervisor
4. Manager
5. CEO/Owner/guy in charge of all departments.
The number of everything depends on the number of shifts/number of departments/etc.
Sure. I've dealt with working with someone who got their supervisory position based on familial ties to the boss. Last I heard, the company went under, because someone with zero ability or experienced was placed in an important position without any ability or experience.
Every other supervisor position I've worked under has been, "I'm a supervisor/manager because I have a combination of experience and education far beyond what you have", and usually proved it on a weekly basis.
That depends. Should someone not be allowed to pass on the fruits of their labor onto their descendants? It's a chaotic process taking place over multiple generations, with too many factors to reasonably count; generally, people with "power" in "the business world" are a result of many generations "not fucking up", and in some cases "luck" and/or "innovation". And, of course, all it takes is for a single generation to fuck all that up as well.
You also take none of the risk, none of the investments, and have incredibly little expected of you as a worker. What you get paid doesn't tend to reflect how bad the company performs, and if you don't like the job, you can just walk out with no questions asked.
I know that there are a variety of advantages to owning your own business, but the level of "grass is greener", especially when it comes to "bourgeois" small business owners is beyond any sort of reasonable defense.
They don't, directly.
You're thinking INCREDIBLY small time, when you really get down to what the very basis of "wealth" means. Stop thinking in terms of "means of production" for a second, and consider things in terms of global financial markets.
The very idea of even paying attention to any sort of business worth less than the top 100 is a completely foreign concept to them. They don't "control" the means of production… the "means of production" is so many levels beneath them that they have managers who manage managers who manage managers who manage mergers who manage managers, etc etc, to the point where even bringing to their attention "how a business operates" would likely get you fired for wasting their time.
Obviously, Marx neither foresaw this, and I'm not sure if he could to begin with.
They literally run the world.
Look at where the U.S. has been invading for the last 50 years, and look at which countries aren't bound to the IMF.
This is the problem when you put on complete blinders to everything outside "means of production". The control of the means of production is a highly significant factor, but it's beyond retarded to claim that it's the only relevant one.
Probably the fact that it's outdated by approximately 150 years, communist revolutions have unfolded the opposite way he predicted, financial markets are wildly different than they were then, he didn't account for overpopulation or the sheer rate of Malthusian environmental effects.
You can still respect Marx for what he set out to do, while admitting shortcomings in need of revision, the same way you can respect Freud while realizing his theories weren't perfect.