Because peace is more popular than war. I assure you the western capitalist class haven’t been outbid by the Russians, although the distinction between western international bourgeoisie and Russian national bourgeoisie is complex.
TBH, I don’t think it’s that complex. They’re all obsessed with accumulating wealth and power over others. The main differences are where they are from and how direct they are able to be in their pursuits under the constraints of their societies. Modern Western bourgeoise appear to envy those in Russia who seem to be able to take actions without needing PR. In the West, the working class aren’t accustomed to people “falling” out of windows and, occasionally, the Western bourgeoise sacrifice one of their own to maintain the illusion that laws apply to them (frequently with minimal actual consequences for the sacrificee).