Russia is the 7th largest economy in the World, and it can afford modest projects like expanding the availability of effective hockey schools. Murmansk is not the answer by a long way, but its one place that could potentially produce more players. If the KHL has any growth designs, the talent pool will have to come mainly from Russia. So the KHL, and to some extent the RHF and central government, will decide whether such investment is made.
You missed my point, which was that you don't need elaborate facilities to build functional hockey schools that could potentially develop a few players. A few here, a few there. Despite demographic trends, Murmansk still has a population of over 300 thousand, according to the census, and that's a big enough town to invest in one or two hockey schools. That takes money, but not enough to be affected by national growth trends.