The blues can express so much. Here is a great blues song "Protest Letter" by Eddie Martin. Even though the song was written in 1977 it is more relevant today than ever.
As Jim Hightower explains it, is that “the wealthiest 1 percent of Americans possess more net worth today than the bottom 90 percent of us combined. Worse, these privileged few and their political henchmen have structured a new economic ‘normal’ of long-term joblessness, low wages, no benefits or worker rights, miserly public services, and a steadily widening chasm between the rich and the rest of us.” We must restore sanity to this nation.