Increases in productivity probably help, but you could say the same thing about the last 30 years — a time when globally wage growth has been flat for most.
Time again, history shows labor rights are demanded not given, except for the few industries where people are most valuable asset of a company.
You could also afford to live in a fire trap tenement house with your family of 8 in two bedrooms, although said houses are now illegal so you probably can't physically do that anymore.
Unions aren’t necessary for increasing wages. We can tell from countries that they’re illegal.
You shouldn’t state opinions as fact.