in phoenix the waste management companies separate recycling from trash after curb side pick up. Its co-mingling. https://en.wikipedia.org/wiki/Single-stream_recycling. It all goes on the same truck. A combination of automation and human labor sorts the trash. To make life easier for the workers(a.k.a. people who get paid to sort your trash), Continue cleaning your recyclables and separating your recyclables as normal. Arizona has a huge problem with trash smells, due to the heat and lack of humidity. Do your part by using the garbage disposal as much as possible. making sure your trash is clean and sorted will result in more recycled waste. Its worth noting that the Arizona system isn't crazy. There is a strong economic argument for a single stream system. I also recycles everything, just what is placed in the blue bin.
The biggest drawbacks to single stream is that the general public doesn't see it and the system requires considerable labor. If you are using a recycling bin in the valley,most of time, it goes right on the trash truck. Very few places have the population density to support two trucks.
In the Future, automated sorting will increase the popularity and competitiveness of single stream recycling. Sorting recyclables by type will soon by a thing of the past.