France has been encouraging the creation of taxpayers with $$$ for at least 25 years. All babies get some Euros as "allocation maternelle", but beyond 2, the numbers go up.
The same demographic problem exists in most industrial countries, but currently aggravated by the boomers reaching retirement. Simply not enough new taxpayers to pay for the costs of the older taxpayers, and too many parents, enabled by contraception and abortion, seeing children as costs rather than as human beings.
Russia's fertiliy rate has been famously disastrous for many years.
"Maybe they should just let in more immigrants..."
that's how the Americans do it.