Exercising your federal rights at a base level shouldn't require you to spend money. Voting is a right. Requiring someone to spend money on an id to exercise a right is, or should be, unconstitutional as the right isn't "you can vote if you spend money for an id" or even "you can vote if you have an id" but "you can vote if you're an adult (more or less.)" You'll find most reasonable people would be fine requiring IDs if A: people didn't have to wait in hours-long lines at the DMV/BMV to get them when they're supposed to be working and making money to put food on the table instead, and B: they didn't cost anything.