You may consider Custom Shop prices outrageous but when you consider the instruments they're replicating - mass produced by largely unskilled labour using some of the cheapest, most plentiful woods at the time - sell for multiples of even Custom Shop prices, it might change your perspective, no?
What's worth considering is how cheap some instruments are, not just how expensive others are. There's a whole lot of exploitation built into your £99 Harley Benton. When you consider the cost of the raw materials alone, never mind the taxes and duties, the transportation, everyone taking their cut along the way, it does't leave much for the poor bastards who built it, does it? Comparing the cost of something made where worker's rights don't exist and living standards are barely above the level of vermin and using it as means to gripe about how expensive instruments made elsewhere is just a little misguided, in my opinion.