Earlier quoted context omitted.
If Google believes the site is being disingenuous by writing a click bait headline, then they should punish the site by decreasing their ranking, not reward it by keeping it high and rewriting a more fitting headline.
But if the title is spam, and the content is good (this is a big 'if'), the best solution would be to rewrite the title so that it's useful and keep the page at its original rank, based on the content. Ideally, Google would be able to handle all these different cases and just give me the best search results. Now, we all know that's increasingly less true, but in theory that's how it should work.
What about the opposite, the title being great but the contents not really? Shall Google serve its own "improved"/"summarized"/whatever version?
Meh... - this reminds me of the snippets of text extracted by some websites that are sometimes shown directly in Google's results, which in my case were sometimes wrong because they didn't take into account the context of what was written in the original contents.