That's extremist, terrorist propaganda!!

There is only one Vader boi & he can't personally chop that many not just the men, but the women and children too.
And the mad lad is just sent on hotspots as a deterrent basically.

And most of the time he fights groups that were established & hoarded their corrupted wealth under the Republic-sanctioned orders.

The Republic artificially maintained wealth classes, kept some planets poor just to solidify it's government's reign & power.
With resources to eradicate it all.