My point is that to collect tax on zaps requires the IRS to spend a small fortune to collect a few pennies. Without doing the math on their costs, I bet it already blows their entire budget for years just what has already passed around. If you did become a person of interest to them, zaps would return so little in taxes owed, late fees, and interest that it would still be hurting them to enforce as an addition to the existing action.
I once heard the math that it would take 10 years of 100% of the DEA budget to clean up the legal pot shops in Denver Colorado. Just one city, just one drug, just the state legal dealers.
To engage in taxing zaps would be certain failure for the IRS and make them a public laughingstock. More importantly, the idea generalizes. Large scale small payments with each being taxed is unenforceable if we all just make as many transactions as possible.