The good news is penetrating trauma patients need transport more than anything else -- BLS measures are just a bonus (
http://www.ncbi.nlm.nih.gov/pubmed/21166730,
http://theemtspot.com/2011/03/12/should-we-let-the-cops-transport-our-patients/).
Also, ALS doesn't really do much as far as broad, system-wide outcomes in trauma (
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2292763/,
http://www.ncbi.nlm.nih.gov/pubmed/17975392).
And ALS probably doesn't do much for getting us functioning people back post-arrest. It just produces more brain-dead warm bodies.
http://roguemedic.com/2011/12/cardiac-arrest-management-is-an-emt-basic-skill-the-bls-evidence/ and sundry other Rogue Medic posts with great citations for those who are interested).
Granted, yes, ALS is great for lots of medical problems. But for many of the high acuity sort of things we think about EMS being responsible for (penetrating trauma, cardiac arrest), BLS is as good or better than ALS as far as patient outcomes go.
Don't get me wrong, I love having ALS. Pain management is very important, as are several other ALS core competencies. But we need to keep in mind that many of the things we *think* ALS would or should do better at are actually better done with BLS measures (or even just rapid transport without any care en route).