[dwolfson20]

It's a nice intention, but how do you devise that mechanism? If I keep $10,000 in my savings account for 30 years, are you going to tax it every year?

[felipemnoa]

The government does that already by printing more money. The more money printed the less valuable your $10K. Better to keep money on assets that do not devalue with inflation.

[wpietri]

Yes, that's how it works: http://en.wikipedia.org/wiki/Wealth_tax