Treat people as voteless foreigners, and why would they feel anything else?
From the economist.com
Despite the new law, however, thousands of citizens abroad are going to remain voteless.
From the time.com
The voteless pay raise was part of a carrot-and-stick deal carefully engineered by House Speaker Tip O'Neill.
From the time.com
For most of the past 98 years, much of the world's female population has been voteless, voiceless, illiterate, ground down by toil and sexist restrictions.
From the time.com
Having grown rich under apartheid by exploiting voteless black labourers, evil white capitalists are now trying to escape with their ill-gotten wealth.
From the economist.com
As the Industrial Revolution moved large numbers of workers into the cities, a permanently landless, and therefore voteless, class developed.
From the en.wikipedia.org
Though the council's recommendations would not be legally binding, its creation was supposed to be a conciliatory gesture to the country's 24 million voteless blacks.
From the time.com
More examples
Disenfranchised: deprived of the rights of citizenship especially the right to vote; "labor was voiceless"; "disenfrenchised masses took to the streets"