[max47]

With pow, the cash you burn on that mining farm is gone after you give up on your vote or your attack. With PoS, the simple act of being rich means you get more vote, you don't need to burn it or spend it. You even get richer while you do it

[idiotsecant]

If you fail to validate with the network consensus in PoS you quite literally burn your money. That's sort of the whole point.