[arin-ppml] Tax incentive for renumbering-related labor costs?

[Tom Vest]

Anyone care to suggest plausible "ballpark" renumbering-related labor  
costs for one IPv4 /24?
I vaguely recall hearing about a couple of private studies estimating  
such costs...

Anyone think that this kind of tax incentive would be sufficient to  
motivate returns to ARIN?

What (if any) legal changes would be required to permit U.S.-based  
IPv4 holders to claim U.S. tax benefits like this for address space  
returned to ARIN?

Obviously lots of variables, esp. if other jurisdictions/RIRs are  
considered, but is this worth investigating?

TV