Starve is out of the table after Stalin used it as an atrocious instrument for mass genocide of Ucranian (and Russian) people in 1933. They remember and will not commit the same error of being passive with the new Stalin 2.0. As ugly as it sounds, "starve" there means cannibalism.

https://en.wikipedia.org/wiki/Holodomor

Also, I looked at it more closely and found that Russia has become food self-sufficient in the past decade. This was likely the key fact that emboldened this invasion. The needs of the people will be met even in the event of full insulation. In fact, accelerating insulation may make taking full autocratic control easier. Few would be willing to die for a revolution if their base needs are met. This seems like a bad time to live in Russia.