I wrote it yesterday. It's obvious that we need to prevent his ultimate ability. -2 tomorrow is worse than -3; right now, all our hope is on Tarkin.
If both the maniac and the mafia shoot, I don't think the maniac will shoot the mafia, and the mafia will shoot the maniac => the same scenario with two innocent corpses.
Therefore, I repeat the question - why is -3 worse than -2?:)
That's the first thing.
Secondly, disrupting the execution costs 45 credits, while the smuggling operation brings in 40k + 5k in nightly income. So, yes, we'll have to have Jabba smuggle even more, but we'll be left with two innocents against the maniac and one innocent. Then what? Hang the mafia and give the victory to the maniac? (He'll shoot before Tarkin, and I think he'll somehow determine which of the two candidates it is).

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!