One of the reasons USSR collapsed was that they could not keep up financially, that included all the medical and disability care.
Bullet selection was definite part of that equation.
I'm sure the fact that they were spending the same amount of money (dollars vs dollars) on their military as the US, however that equaled 25% of their GDP while it was only 5% of the US's, would have been sustainable had it not been for all those injuries in Afghanistan from all that 5.56 the Mujahadeen were using against them caused...... wait......