At least two possible reasons, all bad.

1. Steal, increase credibility for the article and the (assumed) real authors by attaching the name of a successful researcher with high credibility. People need to publish a number of papers to get their degree. Doing this may help them getting published easiser. A bit like also stealing the actual contents of the paper from an already published paper.

2. Destroy the credibility of a researcher by attaching their name to a paper that is falsified, plagiarized.

My very unfounded guess is that it is more (1) than (2) at play here. But research in political science is probably more at risk to cause anger and enemies than say cosmology. Unless the research is related to dwarf planets or some such.