Ignoring positions that are not offshorable such as govt workers, railroad employees, self-employed, etc.) -- do you really want to compare how many union jobs in manufacturing have disappeared compared to non-union jobs over the last 30 years? Example - Flint Michigan: "General Motors employment dropped from 82,000 in 1970 to just over 14,500 today."
Comparing precollapse USSR to precollapse US Very interesting. http://madconomist.com/what-if-us-collapses-soviet-collapse-lessons-every-american-needs-to-know