I have heard this, and it sucks, but also good. Low income earners also have considered gas an "ignorable expense" for too long. It's something that some budget for, but for most its simply ignored.
Everyone should realize how much they depend on oil. For low income hopefully they wake up and start considering other modes of travel. Carpools, bikes, transit (and demanding better transit too). It's not fair that it affects them more, but the vast vast majority of Americans consider gas to be "normal" and its high time everyone gets real with how fragile the system is there.