It's not that easy to increase wages and give out bonuses. First things first are stockholders and people like rvers who want a return on their investment in their portfolio. We can all complain about minimum wage, CEO salaries, etc. but the bottom line is profit.
I doubt there are many rvers who don't shop at Walmart, or use the wifi at McDonald's over a cup of senior coffee. Why? People are cheap and they want things for next to nothing.
Using cheaper and lighter materials doesn't have to account for sloppy workmanship and rigs that leak because they weren't sealed properly to begin with.
I doubt you would buy a new car and take it for a leak test, smog inspection, etc. Why? Because there is regulation in the automotive industry. Above the frame on an rv, there is no regulation. That RVIA sticker doesn't mean squat.