Ukraine might economically collapse under the weight of the war machine of one the biggest military powers in the world.
You could do better than spinning classic Russian propaganda tropes of "Ukraine is the most corrupt country on Earth".
There is corruption in Ukraine, more than in the EU but about the same level as other non-EU countries like Moldova, Serbia, Kazakhstan etc.
Russia could economically collapse as well though it’s true that they have a longer runway. But as far as corruption goes I think Russia is far more corrupt than Ukraine, US or China. Russia is literally a mob state in its current form.