This relates to something I have been wondering about: If one could get one's company to pay one in electronic cash, what is to stop one from piling the coins in a Datahaven somewhere (assuming one existed that would be usable for these purposes) and say to the IRS: Money? What money? Can you find any of my money? I, uhh... lost it! Yeah, that's it!! What is to stop the IRS from pointing out that you received the money from your employer? Maybe you could convince them you were unable to pay, but that would require squirreling away(and refraining from using) all your assets.
FYI: Cheating on an IRS tax return is considered the same as not filing one -- there is NO statute of limitations. This means if you place your money in a money/data haven, and spend it 20 years later, you can still be nabbed for tax evasion.