Russians seem less interested than before in a cosmonaut career.

In a way, it also means the economy is improving in Russia (there are more rewarding jobs) and the few active cosmonauts have a better chance to fly....But it also reveals how the job is mainly perceived (and I think it's also the case elsewhere): to be a cosmonaut or an astronaut can also mean a degree of fame (doors get open moren often, they are sollicitated for all kinds of reasons, they're going to find an editor and readers if they write a book, etc..)
A friend once told me he heard a then just selected astronaut (long before he had his first and only flight) say to himself: this is it, I'm famous and I'm going to capitalize on it...
The job of astronaut is quite an odd one: lots of representations, trips, training and after many years, a one week long flight (not even necessarily a long duration one; many NASA astronauts would rather not fly and stay aboard Mir).

Of course, it's human nature and some do enjoy the romantic aspect of the job, rather than the fame that goes with it.
But very few spend their whole active life in it; perhaps Young and Musgrave are the only ones.

Going to the Moon might attract more young volunteers again! Well, in the countries involved in such an endeavour.