Equality is bad; equal opportunity is the true goal
Liberals, or progressives, will acknowledge that socialism and fascism have failed compared to capitalism, but capitalism is evil too (so they believe), so there has to be another way. One of the goals of the Communist Party USA is the “creation of a truly humane and rationally planned society.” Nothing wrong with wanting that, but what does it mean to be rationally planned?

‘Just need the right people’
The backbone of the socialist argument is that if you have the right people in charge, they can design society to be ideal. I totally agree, but who decides who the right people are? How do we ensure the people that are in charge enact policy based on what is, rather than what should be? Once we choose those people, how do we police them if they do get out of line? The assumption is they would decide all that, basically making them infallible BY DEFINITION.
The fact is that any society that relies on a handful of people to ensure the success of a nation can never work, because it is impossible to ensure that the candidates in question will behave properly. This is common sense; why not have a dictatorship? If you ask people what is a dictatorship good at, the knee-jerk reaction for most people would be “nothing, its oppressive.” Well the fact is, dictators get things done infinitely faster than a democracy. That is a fact. The problem is what if that dictator gets bad things done faster? Like, oh… I don’t know, engage in genocide?
Equality destroys nations
How do you ensure equality? Let’s say we wanted everyone to be equally proficient at rocket science. How would we do that? We could educate everyone at a PhD level to ensure everyone is good at it. Would this work? Of course not. Many people don’t like rocket science; some do not have the intelligence to grasp all of its concepts. So an equal PhD level is unattainable. How about if no one gets to know it? That would make everyone equal.
The path of logic I just followed is undeniable, but if applied to wealth, home ownership, etc., people go on tilt. They don’t comprehend that equality is so bad, it will actually destroy a nation. A society can only demand equality of opportunity. Being poor should not prevent you from getting a decent education, but it does not entitle you to an extravagant education. Same goes for health care.
Equality = spread misery equally
If I have less money than someone else, and I want more, that might drive me to work harder, make certain choices in order to better myself. The way to make most people equal at golf is not to teach everyone how to play at Tiger’s level, it is to make them all equally mediocre by preventing practice, or expensive equipment. If no one makes more than I do or performs better than I do, what will drive me? The greater good? What if the guy next to me doesn’t give a crap about the greater good?
Inequality is wonderful
Inequality is ABSOLUTELY NECESSARY to ensure the continuing advancement of a society. When people compete, some will lose. But that doesn’t mean everyone should lose to ensure equality.