Why is plagiarism apparently more common in research funded by the NSF than the NIH?

Figures just out reveal that the US National Science Foundation (NSF) received 54 allegations of research misconduct in the 2022–23 financial year. Thirty-three were allegations of plagiarism while 21 were of falsification or fabrication. They closed 15 cases, 10 alleging plagiarism, one of falsification/fabrication and one case that was a mixture of the two.