What about someone with no, or very little moral values who would not be bothered to act in an immoral way? I have my own thoughts with regard to this, I am just interested in your own.
We can speak of "morality" in two ways at least. As what we say or as our conduct says.
In the first case the matter is open to confusion and lies. Morality as a code of conduct can become detached from morality as conduct. If a person doesn't know what the basis morality is they may look to tradition or elders to guide their conduct. But it's always better to know things as a matter of what does what, rather than as a generalized matter of what is generally preferred or said.
Supposing that we provisionally accept my proposition that the basis of morality is natural then maybe commandments and laws are unnecessary. In my experience the matter is always and enthusiastically distorted by the stories we tell, especially in Hollywood. We like to scare each other about dark things so that in our collective imagination there are very bad people who don't actually make sense in this scheme, but they might not even really exist outside of stories. So I would rather speak to someone who can reflect on their own experiences.
Discarding second hand tales, and putting aside the occasionally corrupted laws and precepts we insist on we are left with only one admissible way of discussing the matter of what is right or wrong: what has what effect in our personal experience.
I can't speak about someone without a moral dimension because I cannot imagine such a being exists. In my experience I have been presented with a choice to do bad things and to lie and it has never been much of a contest. I don't like what it does to me and I have to live with myself, so I am careful about what I do.
So if there are people who are apparently beyond the reach of their own conscience it seems to me that it is apparent only. It is not so. People who behave in such a way that goes against their nature suffer - drugs and other indulgences are not only celebratory but are also used soporifically against the conscience. Lies are told to obscure what in some circles may appear to be a weakness, but it is very very hard to murder despite the fact that people are squishy and weapons are lethal.
Rationalizations may go some length in the direction of obscuring but the cost is always higher. For example, to lie one loses the capacity to trust. To kill one loses the capacity to feel innocent. Everyone will have quiet moments and naturally outstanding matters return until they are dealt with, some actions are so hard to deal with they require ritual cleansing and enormous self-sacrifice to even amend to the point that suicide is avoided.
I don't accept the idea that morals are relative or subjective because I discard stories and precepts first and look at the basis for the talk. It is essentially that we are not entirely individual. We cannot be. Life is bearable in as much as it is not solitary and life is horrific and impossible in as much as it is solitary. And wicked people are the most solitary people in the world, surrounded by lies that obscure what they perceive as weaknesses and people who fear and distrust rather than love them. (I don't mean solitary in the sense of being alone, but as a matter of being closed off from open engagement by internal difficulties.)
Corinthians says, "All have been made to drink from the same spirit"
By that I take the meaning that the root of morality is that we are not separate in some ways and it is this shared
spirit - our nature - that our existence is predicated upon that asserts morality. In which case there is no subjectivity, no relativity, merely confusion about what does what, which we call ignorance.
Immorality is self-defeating. "We are not punished for our sins, but by them." - Elbert Hubbard.
My concern is over misdeeds which require no social action to correct. But shaming and criminal justice are also consequences of the misdeeds. On a social level it's understood that some things hold a society back. If there's no trust what sort of organizing is possible? If there's fear who can get anything done? All organizations from a friendship to family to a community to a nation to the world will be exactly as enjoyable and efficient as the degree of virtue being exercised so again, societally as personally people get what they deserve.
In short consequences come naturally. To explore the matter further it's not always clear what those consequences will be - especially if we're not admitting subjective experience;
how it feels and speaking intellectually or soley as a social matter. And on the other hand proverbs 21:2, "Every way of man is right in his own eyes, but the Lord pondereth hearts." It's hard to say what another man's sins may be, but it is the nature of things that is well previous to what anyone says and ensures that any small momentary advantage a wicked person may be granted for their shortcuts through life or their inability to contain their selfish passions - these have effects that are generally grave disadvantages.
So, no one can be "without morals". A person without morals is entirely imaginary. When people say, "I had orders" or make other excuses they are pretending that those people who were in on it, who gave the deeds a rationale and assisted bear a share of the burden of the guilt, but this is just the usual way someone talks - wishing it were so in a way that is almost without parallel because the damage is hideous and unbearable. I could go on here, but the matter of rationales is just a form of lying. While we do feel for each other compassion for the wicked is difficult to say the least, even when that wicked person is yourself.
I will leave you with one final bit which I think underlines my basic premises. There is a very compelling reason to not become a pitiless scoundrel, you would then always be in the company of at least one pitiless scoundrel no matter where you went.