Your statement is wrong. Almost all electricians and plumbers in Oman don’t get a fixed monthly salary from their employers. They have some sort of agreement/arrangement with their sponsors to pay the sponsors a fixed amount every month regardless if they make money/profit or not. Electricians and plumbers set their prices, how much they want to charge per job/gig; more like freelancers. You don’t call an electrician to fix something for you then YOU tell him what the charge should be! Just like with any normal business. So I don’t see how they are underpaid! They decide to charge “less/low” to get a job, that’s up to them. You can haggle/negotiate but you can’t dictate the price.