I see no difference between GOG and every other store (not digital too) in the world... the same things were always valued in different way around the world.
Why are BMW cars so cheap in Germany ?! This is not right at all !!
And yes, GOG is in the internet and it's accessible at the same way everywhere, but still, in the physical world there are political and financial barriers, and GOG needs to deal with them. You'll have to change how the entire world works.
They tried to be different, but they are too small to win against an already established system.
Also, games are not exactly first necessity goods, and if someone doesn't have the money for the last AAA game, could just wait until the price drops, and maybe the super sale starts... it's not that people can't find something alternative to play for cheap in this era.
The most "fair price" I have seen was 5€ "discounted" for a 60€ game, so I can't see a great difference in my country, and well, while I could afford that, I'll just wait anyway, and after 2/3 years, it will become 20€, or maybe 10€ on sales (with added other games too as a gift, and maybe in the mean time it becomes also the GOTY edition)...
It seems in bad waters by now, but still is one of the best stores around, just for the offline downloadable installers, and the pretty decent community (some threads are really full of haters sometimes, but mostly there are really helpful people), and I hope it will not fail.