Your question seems to speak to the idea of placing other issues under the umbrella of economic justice and thereby creating a coalition of people that fight multiple injustices but are united by economics. I fundamentally reject the premise that we are united by economic injustice. I reject the idea that racial injustice must be seen through the lens of economic injustice. This notion has it backwards. The only revolutionary fight worth having is one that eradicates racial injustice. Economic populism is not new. It is not revolutionary. The country has been down that road many times. It always fails. Why? Because we continue to avoid dealing with the real problem - race. From the days when both black and white indentured servants were brought onto the killing fields we eventually came to call the United States of America, those in power knew (and still know) that race and is the most effective tool of marginalization and disempowerment.
You want economic justice, then the the real fight is for racial justice. Economic injustice must be seen through the lens of race. You eliminate the racial hierarchy and the class hierarchy falls down with it. Capitalism feeds on racism. It constructed "race," which has no biological meaning, to sustain itself. No politician who promotes an economic justice movement without leading FIRST with race will ever get my support. And certainly not one who was part of the civil rights movement and therefore knows better. Certainly not one who threw away the opportunity to teach a younger generation that which it is naive to. What has happened in 2016 is not simply wrongheaded but actually dangerous to the plight of POC. Many young people believe a colorblind myth about economic injustice. If there is to be any kind of coalition building, we need to replace these mythologies with truth and those who consider themselves to be allies of POC need to get real about race and privilege. Collective accountability begins with personal accountability.