Making things up again? I haven't used that number at all, it relies on a way too low FairTax rate (23% ti), since the "prebate" entitlement is equal to the FairTax that would theoretically be collected on poverty level goods and services, then a much larger FairTax rate makes the prebate cost grow in a linear fashion with the rate. If the rate is actually 50% higher, then the prebate program cost would be 50% higher.
"Making things up again? I haven't used that number at all,"
Nope, making nothing up. You've cited extensively from the infamous Tax Panel Report and it is there that the claim was made about the $600 billion totalling up to be a huge "entitlement" (both the Panels words and yours) all the while ignoring the very obvious fact that the prebate was not "spending" in any normal sense of the word but a refund of tax money to taxpayers and that any "cost" (funds really) was already encompassed by the 23% revenue neutral rate.
Are you perhaps trying to compete with Mr. Gale in quoting the highest FairTax rate with no evidence? His quote with no evidence was "94%". You've got a ways to go.