Where I live in the UK (and this is probably true, to some degree, for most parts of it), the local council provides each household with 3 wheely bins - a brown one for garden rubbish, a green one for household waste and a grey one for recyclables (paper, metal, plastic).
We have a basket in the kitchen to collect the recyclable waste before it goes into the bin. I am constantly having to remove items from the basket that don't fall into that category (particularly those foil cat food pouches). When I confronted my housemate about why he keeps putting things in the basket that don't belong, he argued that it doesn't matter which bin the rubbish goes in because recycling is a scam and it all ends up in the same place anyway. I asked him why he believed that, he just shrugged and told me it was common knowledge. He then asked me why I thought it was true, given that I'd never followed our rubbish to a recycling centre to watch it be recycled. This was a good question. I responded thus :
* We know that the grey wheely bins are emptied, once every 3 weeks, by people different to the ones who collect the other bins, driving a different vehicle. We've seen them.
* We know that recycling is a real thing. It's documented. It happens.
* We know that recycling centres, where recycling happens, exist. Their existence is documented. People are employed in them.
* We know that new products are often made of recycled material. They carry officially certified logos and symbols to authenticate that fact.
Ergo, our recyclable materials are collected, taken to recycling centres, recycled and turned into new products that end up in shops and supermarkets some time later. I don't need to see it happen with my own eyes because every link in the chain has been verified by other, qualified, people who I have no reason to doubt.
Now, of course, this could all be a hoax. The local council could simply be using it as a way to bilk the taxpayer. But given that they have had to provide every household with a separate wheely bin and employ a company to collect them, and are subject to audit by outsiders, how much profit can they actually be making? The council refuse department employs hundreds of people ; some directly, many more as outside contractors. Why has nobody ever been disgruntled or honest enough to reveal the truth (especially as a lot of people have been made redundant in the last few years, so wouldn't really have anything to lose)?
The recycling industry employs thousands more. Wouldn't they know that this hoax was going on? Why would they collude in it? Even if they were getting kickbacks (which wouldn't be much, after the council has spent all that money on grey wheely bins and keeping their own people quiet), or were concerned that exposure would make them look bad for some reason there would still be angry or concerned people willing to blow the whistle. In fact, there would be no reason for the recycling industry to keep their mouths shut - whatever bribes they were getting would be far less than they could actually make by selling recycled material to manufacturers.
Unless, of course, recycling never happens, new products are never made from recycled material and every local and national government, materials scientist, media outlet, manufacturer, recycling company and environmental organisation in the world, thousands upon thousands of people, is involved in a massive, eternal, conspiracy to defraud the public by pretending that recycling is a real thing.....