There have always been hordes of spam and scam websites. Can you point to anything that actually indicates that the ratio is now getting worse?
No, there haven't always been hordes of spam and scam websites. I remember the web of the 90s. When Google first arrived on the scene every site on the results page was a real site, not a spam/scam site.
That was PageRank flexing its capability. There were lots of sites with reams of honeypot text that caught the other search engines.