Hard at work

What does 'hard at work' evoke the image of? Muscled men working factory jobs, hammering down steel plates? Perhaps number crunchers with outside glasses looking at their computer screens with concern? Or maybe kitchen workers hurriedly prepping for a grand dinner. How bout childcare, you think about that you misogynist pig? Or farm labor? How about mountain porter? Or a trekking guide? Oh you think being a pilot is easy? How about a firefighter? Oh do mathematicians study math because it's the easiest thing in the world? Or are the doctors lazy buffoons in it just for the money? Economists? Professors? Tch tch tch, look at yourself maaan what has BECOME of you!