It’s supposed to be, but it’s really not. The government is for and run by people or groups of people (like corporations) that have money. Money=Power in the USA.
The only way to have any impact on changing things is when most people pay attention, get out and vote, stand up and voice their opinions and concerns, stage protests, stop buying stuff from the power holding companies, write letters etc. etc. etc. Unfortunately most people in this country don’t do this out of laziness, a belief that their voice doesn’t count, or because they’re too busy dealing with their every day lives to have any extra time or patience or know how to do these things.
Plus our country is so polarized on what each side really thinks is right and wrong or good and bad or helpful or destructive or effective or ineffective that it’s hard to see eye to eye with each other. So we fight and argue amongst ourselves and don’t have the power, knowlege or energy to fight the holders of the power. : (