Let’s look at it this way - they were already going to be dictatorships, the dictator picked what he told the people they’d get. Most of the big ones all say Power To The People as they’re pushing their way to the top, but as soon as they get there they make themselves permanent. Some of them took a pretty good stab at it like Mao or Stalin, but they killed their people in droves to make it happen. Once that happens you gotta stay in power or they’re going to kill you. And of course, with themselves at the top of the heap, they took everything for themselves and The Party, and The Party became the end all and be all instead of actually advancing the country.