Socialism rewards hard work, while under capitalism the richest people are the ones who do no work at all. In a socialist society, the working class controls the means of production and the fruits of its own labor and therefore has a real stake in the realization of its full capacity to produce. The main incentive to work under capitalism is the threat of being fired and starvation. Under socialism, a person is paid according to the work they do. Under capitalism, the least productive members of society—the bankers and CEOs—grow obscenely wealthy while working class people live paycheck to paycheck.
How would you respond to someone saying "Under Democratic Socialism, there is no incentive to work"?