Wages aren't entirely insulated by industry, though. A simple exemplary scenerio: if everyone knew engineers could stop engineering tomorrow and get data entry jobs for 45k/year, engineering firms would pay their engineers more to keep engineering. But if those decent jobs aren't available to them, the firm knows the workers will be much more likely to accept 45k a year to engineer.
Though some industries ("biomedical engineering") are more insulated from wage depression and men-dominated careers do tend to be more insulated than women- dominated or equitable careers.
When there is no actual outlet for your political imagination or building towards your goals, the "just do a bunch of charity" fantasies creep in.
I know, I have them too. Hopefully someday we'll have built enough of a movement that there's too much to do in that arena to think about a quiet life where I just give what I can away.