There can be two scenarios. In capitalist system, we will be having 3 classes of people - around 5% who are rich, another 90% who are in the middle-class with a relatively comfortable style of living, and then the remaining 5% comprised of "poor" people. The in socialist system we will have only two classes of people - 1% of the population will be ultra-rich (mostly the ruling elite) and then the remaining 99% of the people will be poor. It is up to the people to chose which system they want in their country.
The people cannot choose the system that they want to get in. It is the society that will choose the people who's in and out. This is the sad reality, even if you're trying hard and working at your best.
There's inequality that can be found in the social status of everyone. But if you're living in a fair system, whether you'll be the rich guy, middle class or poor guy. As long as there's an equal share for opportunity, that would be the ideal system.