Only thing that will change Putin's mind is his defeat on the battlefield, period. Definitely, not sanctions. He will only stop if stopped by force. Sanctions only affect a very small fraction of Russia's population, so called quasi-middle class. Putin and rich oligarchs have more than enough, the poor majority is not affected.
Why not help Ukraine with jets and anti-air and solve Putin's problem now? It's obvious that corporate US thinks it is less profitable for them to escalate. It's more profitable to let Putin destroy an entire democratic nation. The short-term thinking and greed will backfire eventually. What does the West think Putin, disconnected from reality, power-drunk primate with a grenade in his hand, will do after Ukraine? Stay peaceful?