the hallmark of progressives progress. A focus on a better way of life for everyone. The second feature of progressivism is applying the scientific method to society and politics. Specifically observation and a willingness to change you're mind (See Tim Minchin's
Storm for a better (and funnier) explanation of science, and apply that to politics and society.
What progressives have observed, time and again, is that power collects at the top. No matter what. People pass the advantages they have to their offspring, who use those advantages to increase their share of wealth and power at everyone else's expense. The American housing bust is a great example. Millions lost their homes and the equity in them. That wealth wasn't destroyed. It's was claimed by banks owned by the 1%.
So if power is going to gather at the top we're left with two choices. Either a strong central government that can stand up to that power, or hoping against hope that the money and wealth 'trickle's down'. We've also seen that money and wealth don't do that.
I'm open to alternatives (I'm a progressive after all). But I've never once heard one that doesn't boil down to some form of socialism, or that isn't just wishful thinking.