Long term, if no one is given credit for their research, either the creators will start to wall off their content or not create at all. Both options would be sad.
A humane attribution comment from the AI could go a long way - "I think I read something about this <topic X> in the NYTimes <link> on January 3rd, 2021."
It appears that without attribution, long term, nothing moves forward.
AI loses access to the latest findings from humanity. And so does the public.
E.g. "Japan's App Store antitrust case"
https://www.perplexity.ai/search/Japans-App-Store-GJNTsIOVSy...
ChatGPT Browse and Bing and Google Bard implement the same pattern.
RAG does allow for some citation, but it doesn't help with the larger problem of not being able to cite for answers provided by the unassisted language model.