Here is a simple idea that AFAIK has not been tried.
Limit "External Links" to only websites found in Google Scholar. More specifically, limit them to only academic sources. (Maybe limiting to .edu or country-specific educational TLDs, e.g., ac.uk, etc. is better. I realise Scholar is hardly a reliable filter for non-commercial sources, given Google's incentives. Remember "Knol".)
This could be an option. Maybe an HTTP header sent to Wikipedia:
Academic-Only: on
The way to "fix the quality of article" is to fix the quality of sources. As it stands, Wikipedia can use any source it finds on the web. (Not to say they do in practice.) That can be an extremely low bar.
One can use Wikipedia solely as a path to "External Links" and/or "References". To the extent that articles just take their sentences from References or External Links, any verification needs to be done on the source, not the article. I use Wikipedia as the default search engine in Fennec. On desktop, I search Wikipedia from the command line with a custom script. The forward proxy scrubs the "X-Client-IP" header. Before reading an article, in the event I read the article instead of only using External LInks and references, I always skim the Talk: page.
https://en.wikipedia.org/wiki/Talk:Criticism_of_Google/Archive_1
https://en.wikipedia.org/wiki/Talk:Knol/Archive_1https://en.wikipedia.org/wiki/Talk:Knol/Archive_2
https://en.wikipedia.org/wiki/Talk:Knol/Archive_3
https://en.wikipedia.org/wiki/Talk:Knol/Archive_4