None of those oligarch are friends of Russian. When President Putin took over they had two options, stay in Russia and face jail term or flee to london. Read about the oligarch to understand their history. They acquired soviet era state resources and industry for free under former President Yeltsin enriching themselves. They grew powerful and ran the nation when Yeltsin was unwell. Most times it was just to make them rich as common citizens and nation fell apart. They were also deep involved with the west. Those who fled are lucky. Those who stay lost everything and are in jail. Chelsea owner Abram was the only one lucky to make a deal to avoid it all. He gave up the rest and gave back 80% of his loot. He is still a billionaire but also had to relocate to london. A decade later he was rehabilitated back to the fold and he is a governor of one of Russian provinces.