seems about right to me, say a teacher and a garbageman pull down 35-40 k. I'm sure it's nasty physical work ( like construction), the teacher has perks like summers off. Teaching isn't known for big bucks.
You can't pay the garbageman Walmart wages, or the turnover would be ridicurous.
Nasty work merits higher pay. Seems to me those guys bust ass pretty hard. They probably ain't too edemacated on average, but they use their bodies to make money.
I'd bet a new man starts at like $10-12 hour, tops out at $18-20 or so. Pay $8/hour and I'd take Walmart over that.