Confiscating all the US billionaires' wealth wouldn't even lower the US's debt by 20%.
France's public spending is 60% of the GDP, the situation in France is totally catastrophic (6% deficit atm) and... We should listen to Piketty because he's only ever worked public jobs and... He's french? And came up with an ultra-simplistic formula using bogus data?
I mean... If Piketty says it, obviously government spending representing 60% of the GDP ain't enough. Let's make it 100% and called it a planned economy. Because we saw a lot of fully functioning communist societies on earth?
Ponder this.