Governments were formed and exist to protect property rights. As much as they can be said to have an underlying purpose, it's to protect property rights, and those who own more property will always have a greater level of protection.
The thing the liberal revolutions of the 19th century, socialist revolutions of the 20th century, and the development of social democracies in the 20th century taught governments is that there comes a point where wealth inequality gets so extreme that it threatens the stability of government, which poses the largest possible threat to property rights. Governments learned that they need to have some form of wealth redistribution in order to prevent a violent revolution. To the degree that governments do address wealth inequality, it's focused on doing it just enough to prevent the system from collapsing.
That's why there's really nobody focused on complete wealth equality. They don't want that. They want to maintain status quo property rights.