Entry level EVs exist that are under $30k USD new. Used EVs and Plug-in Hybrids exist that are under $20k USD.

I spend less on electricity for my Chevy Volt than I would for any combustion vehicle.

Sure, your example "low income people" won't be driving around in a brand new Tesla, but anyone who's buying power includes a $15k-30k vehicle can just as easily buy a plug-in hybrid or entry level EV.