Maybe, but more importantly, rangefinder lens designers don't have to worry about avoiding a swinging mirror close to the film plane, so short focal length lenses can be both simpler and closer to the film itself.
Leica M lenses could easily be less expensive than they are, if they used less expensive materials and were designed and manufactured to wider tolerances.
But that would be inconsistent with the market they wish to serve, so they don't do that.
If they did want to do that, and to match them up with lower quality cameras, perhaps they could increase sales volumes, and therefore achieve some price advantages out of some economies of scale.
It is similar to cars. GM could make relatively inexpensive Cadillacs, and sell them out of bare bones dealers, if they wanted to.
But they don't want to.