Empty fields by themselves do not do anything, however huge they may be. It's people who make things.
Russia is below 150 million people, with nearly zero growth.
To understand the scale of that number, consider that, say, Nigeria has 170 million people, Pakistan has nearly 200, both growing.
Economy of Russia is not that big - about an order of magnitude smaller than the West. And to make things worse, it's almost entirely built on oil/gas exports. If, hypothetically, all Russian trade with the West would stop, the West will have slight decrease of economic growth, whereas Russian economy will just crash and burn.
Good state of economy and politics make people want to do great things. Bad state of economy and politics makes them want to leave. Quite a number of educated people in Russia are not at all eager to live in USSR v2. They are leaving. For example, Israelis report a sharp increase of immigration from Russia.