That seems a false comparison. According to Russia's former
richest man, Mikhail Khodorkovsky, the "oligarchs" aren't even
oligarchs....corrupt business owners who raided Russia's assets
after the fall of USSR. They're beneficiaries of political power,
but don't actually wield it. In a sense, Putin has preserved
socialism by maintaining control over the (now privately owned)
means of production. Notice how "oligarchs" who misbehave
wind up in prison (if they're lucky) or dead.
As for the claim that friends of Trump are doing the same thing,
where's the evidence?