You're confusing a rising tide with a water hose. We absolutely know that increasing wages is good for the economy, but that helps everyone. Oligarchs benefit financially from poverty, even if the economy suffers. As you said, they want suffering, because it allows them to exploit people. Capitalism is the idea that one with means can leverage their position to capture disproportionate value from effort of others. Don't confuse capitalism with the economy. Capitalists always make money, and they don't necessarily make more money when the economy is thriving.