Since there are no top level comments putting this out for probably obvious reasons, here is a supportive comment for the article.
This is what people feel in their guts when they drive out on tattered roads and avoid going to the hospital even though they are sick, when they don't have a real increase in wages but are working longer hours. They have the sense that something isn't right, that there are two sets of rules and they got the shaft when it comes to that. Where police forces are cashstrapped and turn to civil forfeitures and ticket quotas while they see famous celebrities and politicians get off for things magnitudes more illegal than what they've done, whether it's smoking a joint or driving while black.
People already have a sense that things aren't fair. There's a reason why tax reform is polling so poorly. There's a reason why most of the country thinks taxes should be higher on the wealthy and corporations. They have a feeling that they are not seeing the rise of productivity in their own life, and they want justice.
My SO lives in SG. She is lower middle class (going to school, father works in a factory) and I asked her about income inequality, for there it's quite extreme. She says it's not that bad because people there have a reasonable standard of living; they can go to school, they can go to the doctor, they have access to affordable food, etc. Income inequality I think isn't a bad thing as long as the poorest among us have some basic level of livelihood. The problem is that in the US, that isn't true, and so, people clamor for justice.