Wages only do so much for social stabilization.
In China, they already have their own class of the ultra-rich. I imagine that can't be of great help when it comes to social stabilization.
No, because in Java you declare variables to have types.
You can write them easy, but they'll be very slow if you want to do anything complicated and/or in a loop.
Unless they get inlined, type-specialized, yada yada yada...