Bonds... time vaults... whatever we end up calling them, I do like this idea of "fixed deposits."
I'm thinking (ultimately) that we should have 30-day, 90-day, 1-year, 3-year, 5-year and 10-year offerings.
The issue becomes incentives. I'd be inclined to suggest reducing the rate for "liquid" savings to 12%, and offering the higher rates to locked deposits; maybe 15% on 30-day, 18% on 90-day, 20% on 1-year with up to maybe 30% on a 10-year "note."