That is another big plus for doing it this way, rather than you fooling people that it will be accomplished later. Because it is very difficult to get an amendment to the Constitution ratified. Much more difficult than passing a tax bill.
You are merely making excuses because you know that a new Constitutional amendment isn't going to happen. Three-quarters is a lot of states...38 to be exact. And most states have income taxes of their own to contend with.
"... That would be merely guaranteeing that there would be no passage of the FairTax ... "
rfg:
"... That is another big plus for doing it this way ..."
You've made i clear before that you oppose the FairTax so this is really no surprise. In fact, it's correct to say that you wish to retain the income tax.
Also, once again we see your technique of telling others what you impute to be the motives and desires of the FairTax backers. And those imputations are completely false so you may as well abandon that tactic.