How progressive was the progressive era?

It was not too progressive for the upper class, but it actually benefited the middle class. Which is pretty good due to the gilded age that occurred not to long ago. This era occurred from the massive industrialization period that they were facing, thus demanding reform for social, political, and economic standards. California, Oregon and Wisconsin were notably taking the lead in enforcing these changes at the time.

One big reform was the development of the sixteenth amendment. The sixteenth amendment restricted congress from abusing income tax. Income tax was then changed by requiring an appointment among the states basing it on census results. As for the creation of the seventeenth amendment superseding articles 1 & 3 by forcing either a normal election or special election of the event of one of the two senator seats. This will allow the seat to be open when a leave of absence is in effect with one or more senators. And as well as the nineteenth amendment granting women their rights to vote regardless of their gender. I shouldn't really need to point out what is important about that.