Comment by onyxringer

Unlike some other replies, I kind of agree with a sentiment (maybe because I did a fair amount of physical labor), but one very important thing to realize is that salaries are not about "what's worth what" and fairness but about supply and demand. Developers get paid more because their productivity allows that and not a lot of people can do what they do. While almost anyone can be a landscaper. And supply and demand in inflexible markets leads either to runaway high or deep bottom price.