If you look for quotes in the article it’s not that hard. Try this one for example.

“Where a career employee holds a leadership position,” explains Ken Cuccinelli, the former acting deputy homeland security secretary under Trump, “that position should be deemed vacant for line-of-succession purposes, and the next eligible political appointee in the sequence should assume acting authority.” Other authors call for political appointees to be put into the line of succession directly, “selected by the President-elect’s transition team” and “in place the first day of the Administration”.

You don’t find it frightening to pack agency leadership positions with acting political political appointees not subject to Senate confirmation?