If liberals and progressives have any kind of philosophy…
(And they don’t. It’s just a grab-bag of “Wouldn’t it be sorta nice if…”)
“The basic (socio-economic) structure is perfectly just when the prospects of the least fortunate are as great as they can be.”
Rawls derives this principle from a thought-experiment known as the veil of ignorance.
“Among the essential features of this situation is that no one knows his place in society, his class position or social status, nor does any one know his fortune in the distribution of natural assets and abilities, his intelligence, strength and the like.”
You might be born into the poorest class of society, so you want to make sure they aren’t totally miserable and have a fair chance at happiness.
So far so good, and most of the Pantheon of liberal/progressive philosophers including Locke, Kant, and Thomas Jefferson endorse a similar structure.
Minimize your chances of total misery!
Maximize your chances of happiness!
What could be more obvious?
And it’s just as obvious that you want to minimize your chances of being born poor and maximize your chances of being born rich.
So instead of urban yuppies and zillionaires with one or two children and migrant laborers with twelve little mouths that they can’t feed…
The poor get their tubes tied after one or two births, and 50,000 children are mandated for Warren Buffett and Bill Gates.
(They could still leave every one of them a legacy of $1 million apiece!)
Fill up that sperm bank, you billionaires! And make room in your mansions and wills for your many many children!
This immediately produces a much wider distribution of wealth, and that’s what Occupy Wall Street and all other movements for economic justice are all about!