I can tell you why as a welder whose getting 17.25 with all those same bennies.
I and everyone else who gets paid around the same as I am know were being underpaid and were not happy about it and I work in a shop. I wouldn't step foot in a truck to weld offsite for less then 35 to start.
The cost of living is lower where I live which is the only reason I have stayed the 6 months I have been where I'm at. I learned fast and now I'm doing stuff guys who have been there years can't do. I can also tell you this, when I go for my review I'm not settling for less then the 2.00 raise, plus the % inflation rate this year I was robbed of.
Rig or offsite welders are not going to come for 35 an hour period. I know most of the qualified applicants that have tested in laugh at the offer that's made to them by my company. Instead they are hiring at 15-17 an hour starting, a bunch of fresh out of school kids who can't weld worth a fuck, don't show up and have no interest in learning shit. They can't read prints, don't know how to fit at all and frankly need a lot of hand holding.
They are also loosing guys who have welded there for 3-5 years because they are pissed when some new guy who can't do shit is starting at the same thing they make, and no efforts to increase comp have been made.
I can tell you this. When minimum wage kicks up to 15 the trades are going to be savaged. Right now one kid on 3rd is making about 1.75 more then a sheetz (gas station) cashier and is doing 10x the work during his 8 hour day.
If they don't want to pay the reasonable increase I request then I'll stay long enough to land at the next shop thats willing to pay what I want. And if they balk at increasing my pay to match inflation with a raise, or new hires with less experience get paid more, then I'll keep it trucking to the next place. And if I find that no one wants to pay for good work, then I'll hang my hood and go back to school and get out of this grind permanently.
Eventually companies are going to realize that you can't offer the skilled worker 2000's era wages and expect them to stay. It won't work anymore.
Here's some of my work if you think I'm being cocky or whatever.
18g