Usually, very much so. Even when I was in and much more so now, the policy was to retain the Legionnaires who showed capability and potential for further promotion and/or specialist trade development. At the end of the first five year contract, most who did not fulfil such criteria or had proved themselves to be recidivist disciplinary cases (you had to have been really continuously bad as junior Legionnaires were expected to do some time in their Regimental jails during their service), were not offered contract extensions. There was always more fresh meat for the grinder coming through the door.
The problem that is developing is not recruitment, but retention of those of sufficient calibre that the Legion requires in the modern era of a technologically advanced, digitised and networked army. Especially as the number of “First World” volunteers at the recruiting centres has dropped and that of “Second and Third Worlders” has increased.
Hence the current drive to recruit more French nationals into the Foreign Legion.