This saying is that personnel is policy. Who is appointed to a particular role says a lot about the importance and priority of the task at hand.
Generally, you put your best people onto the tasks considered most important and your lesser people on the tasks, obviously, less important.
In Machiavellian environments, like politics, there are certain tasks that you want to look like you are prioritizing but you really don’t want any traction. In those cases, there is a certain class of people you appoint who will make a lot of noise, look really busy, but in the end will achieve nothing. And in some cases, will retard the actual task.
In Australia, for example, whenever the government wants to take the political heat out of something but achieve nothing, they appoint Arthur Sinodinos. Similarly, if they just want to retard a function without care for the politics or consequences, Stuart Robert is the man for all seasons.
It is no different overseas with the news overnight that incoming US President Joe Biden has nominated former Senator and Secretary of State John Kerry to be his Special Presidential Envoy for Climate. For those unfamilar, John Kerry has an exceptionally long record of solipsistic bloviation accompanied with an equally long record of non-achievement.
For all the talk of green new deal, a renewables new world order and the end of US fracking, in 4 years at the end of the Biden administration, expect there to be a continuation of Kerry’s unblemished record of record of non-achievement.