Have you seen The Good Place? There is a part of this where they're investigating the "points" system that is used to determine who does and doesn't get into the eponymous Good Place. It's a dead simple system: you do a good thing and you get some points, you do a bad thing and you lose some points, the more gooder or more badder the more points get added onto or subtracted from your total, and anyone over a certain threshold gets into the Good Place. It makes perfect sense, and it's exactly the kind of system I think most people would design if they were the ones given the task. I know it was my first idea when I considered the problem, and it seems like that system worked well enough when it was first rolled out. On investigation, the characters find out that

This is something that comes up in leftist circles from time to time as well, and a place where I break from doctrine. There's a common phrase that popped up as a reaction to what you said above, "there is no ethical consumption under capitalism". Everything involves exploitation of the environment, or of labor, or generating waste and other externalities that you're just not gonna deal with. You're gonna have to do something unethical in order to create more value than you invest in something. But, on the other hand, we need to live here. We don't have the luxury of designing a system from scratch with ethics at the forefront, our kids are hungry today. So you do your best, you keep your consumption to a comfortable minimum, you use the paper straws when you can, you try to shape policy toward decency with what little power you have and you don't hold yourself responsible for what's out of your hands. There are no ethical consumables, but their can be ethical people.