Tar and feather one and the others will likely pay attention.
Just kidding (somewhat), but with zero consequences, nothing will change.
Other than tar & feathers, why couldn’t caning be an option? Either punishment would be something they would remember for awhile...along with the general public remembering it. It seems to me that any punishment for a deserving public official needs to be something they would remember for a good long time. Censuring or jail time just wouldn’t provide the needed effect.