Possibly, but again no indication that their service was under anything other than voluntary conditions. I would assume even a clone would be entitled to self-determination. (this isn't Star Wars after all)
How could they be? If they're clones, the people making them choose how they're raised, educated, indoctrinated. It'd be counterproductive, if not pointless, to put any ideas in their heads that don't end with them having the exact point-of-view you want them to have, and since clones armies are mass-produced by definition, the very process of education, the balance of nature and nurture, could be standardized to always produce the desired result. It's "The Boys From Brazil" to the hundredth power. There's an argument to be made for granting clones civil rights and self-determination, since any that had some freak encounter during their lives that made them decide soldiering wasn't for them after all would no longer be the clone soldier you ordered, and just letting them go off would be the cleanest solution for everyone, but there's also an argument not to give them that choice, because acknowledging that capacity could make it seem like raising beings from birth in a precisely-controlled environment mean to make them unquestioning tools of the state is immoral. Which it is. But if you're going to educate your clone soldiers in a holistic, open-ended manner where they're likely as not to choose not to be clone soldiers, what's the point? You're just pumping new people into the general population. You could get the same result with baby bonds or raising the price of contraception or some other way of juicing population growth the old-fashioned way.
Anyway, Timo is referring to Starfleet officers as "slaves" in the same sense that a nominally free worker could be called a "wage-slave;" they're not formally regarded as chattel, but their employer provides them the means to remain alive as a condition of their employment; you can't really say someone is "free" if the consequence of disobedience is that they lose access to housing, food, and medical care (even though the employer controls access to those necessities indirectly, by providing money, rather than supplying them directly). Similarly, Timo is saying that the average Starfleet officer isn't that different from a hypothetical mass-produced Data; they are trained to be obedient, to give their lives if asked to do so, to perform any act they are ordered to regardless of their opinions or beliefs, and if they object or fail to do so outside of carefully proscribed circumstances, they are punished. Just because they volunteered initially doesn't make them any more autonomous than robots when Captain Brannigan is ordering wave after wave of Starfleet "volunteers" to their deaths, or they're being kept fighting on AR-558 for five months when they're "supposed" to be rotated off after three, or Captain Riker decides they need to ram the Borg Cube. When you've got a volunteer army willing to do all that, what do you need a mass-produced army of un-people for?
(I don't think that captures the whole picture; Federation bigwigs would certainly be more tempted to do bad things if their officers went from being "expendable" to "disposable," with no grieving families, and if it could be guaranteed they'd have no moral or personal qualms about any order, and would never confess or leak or whistleblow about anything, and they'd have a harsher solution for noncompliance than what is given to a conventional officer; we've already seen that, with the old EMH programs being recycled as holographic laborers, and if they hadn't been, they probably would've been deleted outright, and the worst thing they did was be brusque.)
Which I guess means he and I are making the same point; If you can shape the worldview of your officers, be it by a public relations campaign, from-birth training, or positronic programming, you don't need to coerce them into obedience, they'll do it because they already agree that the powers that be have the right goals and the moral authority to use them to execute those goals in whatever manner they see fit. The saving grace is that the normal way of getting a Starfleet officer is, ironically, a lot more failure-prone, and thus more resilient against failures of leadership. A good officer in a crunch could be exactly what would be considered a "bad" toy soldier.
