In Russia few oligarchs get all the girls.
There are about 52 million women aged 15-64 in Russia...
pl.wikipedia.org/wiki/Rosja
...let's narrow that down to 18-44 group - we will get about 28 million.
Let's assume optimistically that about 25% of that group is shaggable.
That leaves us with 7 million definitely shaggable Russian women aged 18-44
(from a sweet teen to a tasty MILF).
Now - let's say that the average age of a Russian oligarch is 40 years old.
That leaves him about 20-25 years when he's able to shag a woman.
25 years is 9125 days. Let's assume that everyday out of these 9125 days
a Russian oligarch sleeps with a different woman from the aforementioned
7 million group (and never sleeps with the same woman again and that every
women that has ever slept with him will never sleep with any other man - EVER).
In such case we would need 767 Russian oligarchs to completely deplete the
supply of shaggable women in Russia in the space of 25 years.
However:
1. There aren't probably as many oligarchs in Russia.
2. They're too busy guarding their wealth and plotting against one another to shag
a new girl everyday.
3. A woman once used by an oligarch is in a perfectly re-usable condition.
4. Wildrover got himself a Russian chick and he's not an oligarch.
Therefore - with simple mathematics and logics I scientifically refuted your theory
that "few oligarchs get all the girls". HA!