Money may not buy happiness, but it's more comfortable to cry in a Mercedes than on a bicycle.
I can't see the term "we all".
Going by the size of them and somewhat minimal text on them, they appear to be advertising posters aimed at business establishments related to the industry to display in a window or on a wall on their premises; not for handing out to the public.
Obviously, someone had the foresight to save and hang them on their garage wall after the shows were over.
I remember the old 'Mechanics Hall' in Boston.