Because Mike works for Gus Fring, presumably he should be all set financially. Also Mike is apparently loyal to Gus. Why would he need a part time job as a PI for Saul Goodman on top of his multiple activities for Gu's operation? This part-time job might even be a conflict of interests. Also Mike is obviously old and not very fit - why does he want extra work?

Why would Gus allow his loyal hit man do part time work on the side?

In Breaking Bad, because Mike works for Gus Fring, presumably he should be all set financially. Also Mike is apparently loyal to Gus. Why would he need a part time job as a PI for Saul Goodman on top of his multiple activities for Gu's operation? This part-time job might even be a conflict of interests. Also Mike is obviously old and not very fit - why does he want extra work?

Why would Gus allow his loyal hit man do part time work on the side?