I do consider this when buying food, and certain other products. I still resent your implications, but I’ll let that slide, assuming it’s not personal or not meant that way.
I try to buy some foods only with certain labels which attempt to guarantee certain animal living conditions, I try to buy conflict-free chocolate, etc.
That is mostly because here I do have an actual choice. The additional costs are not nothing but not incredible, and the benefit is somewhat dubious(I don’t actually believe in these labels all that much), but probably not nothing.
The hope is that the worst things happen mostly for the products that don’t even care about such labels.
But with slave labor products, there often isn’t a choice. Unless someone finds out, nobody will tell you: “our product contains slave labor”. That’s why it’s different from buying a product that explicitly isn’t labeled “Bio”, “cruelty-free” etc. in a supermarket.
What I want is that one should not be able to buy a product that contains slave labor under any circumstances.
Enforcing that should be left to the government, not a label, and not the consumers.
Because only then you can start actually making a difference. People are always going to prefer the cheaper product, some because they have no choice. And slave labor will always be cheaper. You can’t condemn people for being poor and not having the choice to buy more expensive products, saying that this is “supporting slave labor”. Same goes for people that don’t know about all this stuff.
The “little improvement” by paying more for
So, to completely remove slave labor products from a population, you either need to:
Educate all people, create a trustworthy label, make them care, and solve poverty.
Or you just make it illegal, actually start doing something against it, and maybe invest in some good journalism, so the few people who know about this grow larger in numbers, and if governments try to be sneaky, hold them accountable.
The people that can try to reduce the impact of slavery by buying more expensive certified “slave-labor free” products, if and when they exist, should buy them. If you hear about a company using slave labor, you should not buy them.
But a lot of people aren’t in that position, there often is no real choice here.
And the impact of such individual decisions might be minimal if not carried out by a large mass.
And don’t let yourself be pressured into paying more because somebody tried to make you feel guilty about something you have no control over.
We elect governments to take responsibility for these things. Even if you want-but-not-need e.g. an iPhone and know about this stuff, you’re not personally responsible for slave labor, Foxcon, or all the other bad stuff that Apple might tolerate.