About half of the recyclable garbage is still burned along with the regular garbage, because it burns better.
Profit is, after all, more important than the environment. The garbage companies in Germany make somewhere between 50 and 100 billion per year.
The garbage companies are burning that stuff because nobody wants to buy it from them. Because often making something by way of recycling uses more resources than the alternative.
This is pretty standard in Western Europe, it's about the same in Belgium, the Netherlands and France at least