One thing almost universal among the poor is the idea that even if they vote that it will do them no good. The poor feel shut out by the political class and worse, they fear taking time off from their minimum wage jobs for any reason. Technically they have the right to vote but in the real world they know that they can be easily replaced if they get on the boss's bad side!
People with good jobs go to work everyday with a sense of entitlement - a respect for them as workers. Low wage workers go to work every day expecting trouble is just around the corner even if it has nothing to do with them. They feel that their employers do not value low wage earners and if they need to take time off ( as human beings do like to take a child to the doctor or whatever) they fear the axe will fall. Taking hours off to vote especially with reports of long lines and wait times to vote is a problem for the poor.
In many ways, our system has not only made it difficult for the poor to vote, difficult for the poor to believe their votes ever matter but also we make it hard on the poor who actually do vote almost as if they have been taught that they may get punished for doing so.
Over the years at one minimum wage job or another... many of them have paid a price for taking time off to go vote. Middle class and educated people will be outraged at the thought because it is the law that a person be able to vote. Poor people feel that such 'privilege laws' really don't apply to them.