[dragonwriter]

I don't think working/managing/ruling is a good class breakdown.

There's labor.

There's capital.

There's a class that has substantial dependence on both labor and capital, with neither clearly dominating their interests.

The first two, sure, match working and ruling roughly (many managers, though, in labor, and some, particularly at the executive level, in nearly pure capital.)

But the group in between pure labor and pure capital—the traditional “middle class” in capitalism—isn't really “managing” as a class, though it includes lots of managers. Also lots of white-collar professionals that aren't managers as such. And even a fair number of independent small business owners that aren't white collar professionals.

The middle class is a distinct class from the working class, but management isn't what distinguishes it. And it's not really a natural class ally of capital any more than of labor, and those on the labor side who attack it (either in its proper identity or as “management”) that way are acting in a self-defeating manner.