Maybe not direct image manipulation as in this case with Alzheimer's, but certainly there is always a lot of monopolistic rich-gets-richer behavior.
Nearly all professors at top universities I have met develop intimate relationships with funders and journals, which they use to steer the field in their preferred direction. As the posted article says "You can cheat to get a paper. You can cheat to get a degree. You can cheat to get a grant. You can't cheat to cure a disease."
I have been asked directly to misrepresent results on several occasions. In the most recent one, a professor who has received all prizes and accolades in his field threatened me and others when we refused to misrepresent research results. I could afford to do this, but my workmates who have families to support were on the brink of giving up to the bully.