One of the clearest examples of the publishing problem to me was the shift in meaning of last authors on papers over the course of my career. When I first start

One of the clearest examples of the publishing problem to me was the shift in meaning of last authors on papers over the course of my career. When I first started, last author meant the person who had contributed the least to the paper (in cases where ordering of effort can actually be determined -- often there's genuinely equal contributions). Often this was the senior faculty member, as they did little but sort of read over a paper or maybe supervise someone independently functioning. Over time though the last author came to mean "the more senior person" and then "the person whose idea it really is". So being last went from this thing that no one wanted, to this thing that people would kind of argue over. In the process the more manipulative cases, people would kind of casually say "oh I can be last author" realizing the gains from that position. It seems when a more junior person is doing all the work and is first author, an unscrupulous senior researcher will claim that "it's the idea that counts"; when that senior researcher is first author, it's "ideas are a dime a dozen, it's getting it done that matters."