After this war is over, Russia will be fucked for 20 years or forever looking at their demographics.
They will do just fine.
Thing is, that Russia will be unatractive place for foreigin investments for at least a decade. Deals which will go trough, will have to be with VERY high profit margins, to warrant that risk.
And that thing that they are importing a lot of tajks and uzbeks, it is not an issue. If you watched V.Putin and T.Carlson interview, then see that in eyes of V.Putin those tajiks also are russians. As they come from "historic russian lands". By meaning, parts of Russian empire and Soviet Union.