What's correlated? Are you saying that pages with great content typically have few spammy links? If so, the jury is out on that thesis, as many of the most pop

What's correlated? Are you saying that pages with great content typically have few spammy links? If so, the jury is out on that thesis, as many of the most popular sites have hundreds to thousands of spam sites that scrape just about everything the do & many of those scraper spam sites do link to the original source. And just by ranking for valuable keywords, over time you will likely get some spammy inbound links from sites that are scraping the Google search results.