The irony here is that the Dr. Seuss author, Theodor Seuss Geisel, was a liberal democrat who supported FDR. In typical bipolar fashion displayed by lib-dems of the time, he railed against fascism (even though FDR was implementing it) and rallied for communism (which has proven even more deadly, most likely due to its comparable longevity).
Socialism has changed since its inception. The Sam has taken so much and grown so powerful, he no longer needs to promise anyone anything. Rather he tells us how bad we are, how needful nature is, and he keeps us fixated on the morrow:
There's a wonderful future, just out of sight,
Being planned for us now, right now as I write.
"It's coming," Sam tells us. "Coming quite quick!"
With homes for the homeless and cures for the sick.
With doodads and gizmos and widgets that shine,
If we'll just follow orders - just stand in line.
Just stop speaking freely, just do as we're told.
Just give up our guns, just give up our gold.
Renounce ALL our rights, and soon we will see,
We've gained almost nothing, but lost LIBERTY.