What were the attitudes of the average American on big business philosophies during the age of Industrial Supremacy?

By industrial supremacy I am assuming you mean the Gilded
Age in the late 19th century, when business and government were closely allied, and
workers had few right and protections.

The attitude of the
"average" American (and it is hard to say during this time of heavy immigration and
migration what an average American would look/think like) during this time was a little
complicated.  Then as now, Americans worked hard each day and valued work.  They were
individualists who believed people should take care of their own families and be
responsible for them.  Entitlements did not yet exist and unions were, for the most
part, illegal.

There was also virtually no middle class in
America at that time, and the average American lived in poverty, with the gap between
them and the wealthy as large as it has ever been in our history.  They believed big
business philosophies like laissez-faire capitalism (no government regulations or
restrictions on business) were exploitative of the working class, and that wages were
too low and worker safety non-existent.  They supported Carnegie's Gospel of Wealth in
terms of its philanthropy, while questioning the manner in which he amassed his fortune,
along with that of J.P. Morgan and John D. Rockefeller.  They challenged Social
Darwinism's claim that the rich deserved their wealth, and that the economy needed to be
purely survival of the fittest.