First of all... way to load the question

Well that's just it... it can save many lives but it definitely infringes on the rights of people.

It is the duty of the government to give each their own due. By using torture that tenet is broken and the government loses legitimacy.

"Kill one, save a million." Oh, I guess it should be the other way around "kill a million, save one." It's not immoral.

Criminals are jailed, their freedom of movement taken away, that's a basic human right (article 13 of the UDHR).

Forget about human rights. When you infringe upon the rights of others, you have forgone your right to rights :)

Torture of criminals is as immoral as throwing them into prisons.

It's immoral for the same reason that witch burning is immoral:

Both are archaic practices which served a purpose centuries ago but have now been relinquished in favour of rights based on human dignity.

Burning witches served a public good of reducing heresy, dissent, and encouraging conformity. We chose to have fair trials and prisons instead.

Torture serves a purpose of punishment, extracting confessions and gaining information, but we now have surveillance technologies like wire-tapping and spy satellites. We also have narcotics which reduce a person's inhibition to speaking, which doesn't require the use of pain.

1st) Torture does not save lives. Non violent interregation methods are much more useful (just ask any law enforcement officer), otherwise, why wouldn't we use torture on convicts in the U.S?

2nd) In the long run torture would still be worse, because whatever group you're torturing would use the fact that you're torturing its members as propoganda to gain more support.

I assume you are talking about the U.S. torturing suspected terror suspects, and if that is the case, then the only way we can really defeat terrorism is if we stop people from joining terrorists groups. Torturing people only makes us look worse, and makes people want to attack us. Imagine if a relative of yours was tortured; you'd be pretty fucking pissed, right? Well that's exactly what's happening. By torturing we are breeding more terrorists.