On Unixes (including Gnu/Linux) suid/sgid (or file capabilities) is the only, native (all other ways use this way), way to escalate privileges.
As a sysadmin, I like to write scripts as they are easy, and well adated to the task. However suid and sgid is not honoured for scripts and other interpreted languages.
Therefore I would like to find some alternatives. (I don't mind general solutions, or special cases).