Supply and Demand works. Maybe not in the Soviet Socialist Republic of Britain...but it works.
Settle down there big guy. I'm neither an economist, politician nor nationalist. I do hail from that f***ed up island nation (birthplace of Adam Smith) you refer to and have no desire to defend it against your subtle implication that it is no longer a free market, if it indeed ever was. Free health care, free education and a benefits system which allows people to live without working is available in every developed country in Europe and beyond (eg Australia). So it is the Socialist Socialist Republic of the European Union if you don't mind. Good or bad, that's the way it is.
Anyway this is a golf forum. The principle of supply and demand may well be MORE prevalent in the micro-market of golf instruction than in the general markets. However, no name clowns who know little about golf are still charging about 70$ for a golf lesson because they are PGA Qualified, sometimes more because they work in a prestigious CC. Minimum wage spring to mind? Price protection/fixing? Monopoly? Giffen/Veblen good (Leady-bee, Breeder, Pelz-Jacke)? Just sayin, man.
Bmanz at 150$ is a gift IMO. Brian, is this price set by supply and demand? Frankly, I doubt it unless your reputation in NO is worse than it is elsewhere for some reason or other: maybe the "prophet without honour in his hometown" syndrome? Why don't you charge more? One lesson with a guy who knows what he's talking about has to be worth infinitely more than 100 with a guy who is clueless. And there are a lot clueless golf pros. Let's see now 100 x 70 = 7000$ versus 1 x 150$ = 150$. You choose.