Don't think that one is true of agriculture, at least not since the invention of the tractor, or possibly even the horse drawn plough. As for the others, you may have a point in some areas of medicine in the US, but in transport and utilities I don't think it is a rise in wage costs that are the problem. Also, aren't the rising wage costs in this case largely driven by keeping up professional standing when socialising with people in industries that are behaving unfairly, like some areas of the legal and financial world, who are for fairly obvious reasons able to renumerate their staff to a level far in excess of the work they are actually doing.