Full Idea
Greeks assumed democracy was consistent with slavery, Rousseau that it was consistent with sexual inequality, and Wollstonecraft that it was consistent with disenfranchisement of the poor.
Gist of Idea
Democracy has been seen as consistent with many types of inequality
Source
Jonathan Wolff (An Introduction to Political Philosophy (Rev) [2006], 3 'Freedom')
Book Reference
Wolff,Jonathan: 'An Introduction to Political Philosophy (Rev)' [OUP 2006], p.86
A Reaction
If you are allowed to restrict the franchise in some way, then a narrow oligarchy can qualify as a democracy, with half a dozen voters.