"Immigrants aren't rushing to Moscow in search of opportunity."

Really?

The Telegraph UK
A vast (The official figure for Moscow currently stands at 11.5 million) influx of migrants, 
legal and illegal, has defeated attempts to 
keep track of numbers in Russia's capital Moscow - Europe's biggest city.

Radio Free Europe
"It is due to such conditions that only 2 million of Russia's estimated 10 million-12 million migrant laborers, most of them from the former Soviet republics of Central Asia, work in the country legally. The rest subsist in the shadow economy."