The Way Out: What Lies Ahead for America by Upton Sinclair, published in 1933. This is what he had to say about big business then. It is still true today.
“Big business is much bigger than our government, and it has ruled our government ever since the Civil War, and intends to go on ruling. The best energies of our people are put to work in the service of private interests.”
Please see Supply-side/trickle-down economics