I mean that 'single stream recycling' has pushed 'diversion from landfill' and 'recycling' rates so high that it has changed the composition of what our recycling actually consists of.

Take a fictional recycling truck driving through a residential neighborhood - 10% or more of the material inside the recycling bins is going to be contaminated 'wish-cycled' material, such as barbecue laden plastic plates, nylon ropes, grease-stained pizza boxes, and soiled paper products.