And with most flavors of socialism you end up with the entire populace as a working class.
How would you define working class under these types of socialism? Are they not different then the typical capitalist working class?
Human greed exists in all economic organizations. Socialism/communism just makes it easier to absolutely abuse humans to satisfy that greed. If the State owns the company, the State can pass any laws, execute any noncomplying workers, or do what ever it wants. When the State is the CEO and that CEO gets greedy, there's nothing to to stop them.
Indeed, greed exists anywhere there is the will to power and a capable ego.
The bolded part is a very important admission on your part. It is easy to say "the state" but what we are really talking about are people in a position of power. If the people in power abuse their power for whatever reason, is that the fault of the ideology or of the man? With different ideologies governing man, each individual assumes higher or lower levels of personal responsibility. It is not unlike the stages of maturity from a child to an adult.
This introduces an important question: do we blame the ideology for how a few men institute and interpret it or do we blame the men?
In theory, industry and government are separate in a capitalist society. So no matter how greedy a CEO gets, the State should be able to prevent mass executions, slave labor practices, etc.
Yes, and I appreciate that you said "in theory". With lobbying, that separation is either thin at best or non-existent as the power of corporations puts policy makers in government or marionette's existing officials completely.
Couple that with multi-national corporations that make more money than most countries and we see that a capitalist society's logical conclusion are satellite government corporations so powerful they literally operate above the law.
The only way socialism and communism can work is on an extremely small scale (village sized). Every time communism has been tried on a large scale, the price paid by citizens has been enormous. How many millions did Russia kill in it's little social experiment? How many killed in China? Why is it so hard for people to understand that this shit may look good on paper, but it doesn't work in practice.
And these models are basically blown up versions of communities. And though it is logical to equate how these ideas were applied in the past with their potential, it makes no sense to compare how they happened in history with how they can happen in the future.
Look at how these individuals worked to institute socialism/communism-- revolution and war and murder. The spirit of men who would kill for their ideals is strong enough to make them blind to their actions. If they would gladly kill those who didn't represent their outlook before they were in power, what could they justify after they gained absolute power?
The weakness here is man. In the end, it isn't the ideals turned into governments but governments turned into men. They are almost certainly doomed to retain power they same way they gained it.
*edit* Just to clarify, I do believe that there are services that should be socialized like our fire departments, police, education, and I believe health care should also be socialized. But I believe socializing everything is a recipe for disaster.
At this point in time, absolutely.