Employ People to Overcome the Obstacles
Instead of relying on volunteers and good will use the public purse to pay people to overcome the obstacles to voting experienced by the disadvantaged.
1. In the lead up to any election use the public purse to provide paid training to sufficient numbers of election officials to do all the tasks necessary to make the election both smooth and accessible to all.
2. Pay the officials to conduct the lection on a fair and equitable basis.
Using the public purse for this purpose would be:
(b) efficient; and provide
(c) a boost to the economy (large or small depending on your point of view); and
(d) give a number of people temporary but meaningful jobs.
I imagine that in some countries this might mean a change in mindset while in others it would flow naturally (if not already happening).