Being very good (and very well trained) is far more important than who or what you are, and, as always who you know is also more important than who or what you are.
Ten years ago we used a crew of 12 to put on an average show, 6 of which would do the in/out only (8 hours because of mandatory minimums) and 5 would be on 'show-call', or on all day, about 12-18 hours (with 1.5 time after 8, and 2x after 12). I could afford to try people out, and even give shifts to the more marginal people who I really liked. Then we moved to about 8, with 4 on show call, and now we use 4-6 with 1 or 2 on show call. That means I can really only justify putting on the best people I can get.
The upside is that the few of us who still work, are making a lot more money.