Once again, I know what you mean. But IMO it won't happen. We'll push him out or freeze him out. Paying his wages while playing for another club will not be an option IMO.
Doesn't have to be an option. For example, his contract could be paid, either in full or part of it up front, when he actually leaves Juve. It's up to Amauri, not up to the club, and that's all that matters.
We should know this by now. Take the Grosso example last season (or Brazzo even). We were desperate to get rid of him, made it clear that he was no longer part of the team, but he did not want to leave for an inferior team / less money than what he earned. And since we did not want to pay the remainders of their contracts up front (which would force them out of the team), we had 0 options.
Besides freezing them out of the squad of course, which we did. (I know, they became part of the team again, but that was not what we set out to do).