pgbench in wrong package?

pgbench is in the postgresql-client-common package [0], but the actual 
per-version binaries are in the server package, e.g., postgresql-16 [1]. 
  If you try to call pgbench without installing the server package, it 
tells you

Error: You must install at least one postgresql-client- package

but that is wrong advice in this situation.

Is there are reason for this arrangement?

(The same confusion applies to vacuumlo.)


[0]: 
https://packages.debian.org/trixie/all/postgresql-client-common/filelist
[1]: https://packages.debian.org/trixie/amd64/postgresql-16/filelist