Let's get that message out.

because they produce the surplus-value necessary for expanded reproduction. they also create the relative surplus population that depresses wages (and thereby "creates" jobs)

No. Business owners do look at expanded demand and sometimes say it's not worth expanding. The demand may be temporary or the increased revenues not sufficient for a new employee or new infrastructure.

And that's just for "expanded production." The proletariat does a really crappy job of dictating these things. The other people also have a say.

Consider computers. When I started, the first PC hadn't been shipped. Creator-produced demand created a small buzz, so we got two. We didnt' create those jobs. Those jobs created demand, which allowed the jobs to continue. Increased demand allowed--didn't force--IBM to ramp up production. At the time we used PC-DOS and homegrown software. Can we program in Basic? Yes, we can! (And Pascal. And Fortran IV.) But we didn't call forth PC-DOS by saying, "We have a computer. I know, let's say there's something called PC-DOS, demand it at the store, and force somebody to design, produce, ship, and sell it. Let's create that job!"

Same for the off-the-shelf text editor. First hard drive on an expansion card. Remember expansion cards? Network. PC-XT. WYSIWYG editor. PC-AT. Anti-virus program. Windows. Database. SQL upgrade. Looked at my first USB port and thought, "What the hell's that? I'll never use that." I bought stuff, my boss bought stuff, that existed because somebody bought stuff and then paid somebody to make the product so I could buy it or be convinced to buy it.

Now, if you can't create a buzz the product dies or becomes niche--that's if some investor falls for the investment. The investor loses his money. Remember the Amiga? Blitters rule! No? If a creator comes along with a better product, the proletariat are fickle. Betamax, ooh ... No, wait, VHS! But which came first--the demand for VHS or the first piece of equipment that used VHS?

Same with the local radio station I listen to. Which did they have first, an employee or listener? Did Ford have somebody driving his first car before he had his first employee? Yeah, it was hard for people to listen to Galileo say that the Earth wasn't the center of the universe. We only say the Earth revolves around the Sun because the center of both orbits is located inside the Sun itself.