Odds question

[Warren Whitmore]

Lets assume that you have a regular IRA & a Roth IRA. Lets also assume that you are in the 35% tax bracket and that there are 15 years to go before you start withdrawls. What % chance do you have to believe that Greenspan (or whoever proceeds him) will institue a 10% federal sales tax and reduces the income tax by the same 10% before it is unprofitable to make the transfer from IRA to Roth?