This has long driven me crazy. I have a version of this argument with my wife every few weeks. I live in a city that has three bins: compost, landfill, and recycling, and overall the city (SF) does a really good job apparently of sorting trash. But if you want a system that doesn't break down if someone throws a handful of batteries in the compost bin, then someone or something somewhere still has to sort the trash s…
Single-stream recycling is a good alternative to this, and has been implemented in Austin. They essentially take your idea to the limit - if someone has to go through it anyway, why not just put it all in one big bin and sort it out later? So they do. Mostly works?
That doesn't sound like a "mostly works" scenario except in the most bare definition of the phrase.