Because the rich are smart enough to keep the working class divided and fighting between themselves, never realizing who the real enemy is causing all their pain.
"The Time Machine is interpreted in modern times as a commentary on the increasing inequality and class divisions of Wells' era, which he projects as giving rise to two separate human species: the fair, childlike Eloi, and the savage, simian Morlocks, distant descendants of the contemporary upper and lower classes respectively."
"(The Time Traveller) realizes that the Morlocks control and feed upon the Eloi."