If you are both “consultants working for the same company,” and therefore you are not the person for whom this consultant is working and/or someone whose ability to do your job is not directly and materially affected, then I would cordially suggest that you ... well ... “mind your own business.”

Although the methods being used by this person might “smell bad” to your own personal set of sensibilities, you don’t know what instructions this person might have been given by the person who issued his contract, and you also don’t know what is or isn’t important from the point of view of the person who is signing his checks.   None of the decisions he’s made are indefensible.

It’s not only bad form for one consultant to question another consultant’s methods or competence ... it can well be political therefore career suicide.   If he does anything at all with Perl, he knows about PerlMonks, and it won’t take him long to find out that he’s been pretty well body-slammed there.   Not the wisest move you’ve ever made ...