(It's crystal clear that we don't want these people voting, not ever!, because it might shift power centers and it might allocate funds to the needy, etc.)
But we prefer the poor to always feel that they are non-people with a "debt" to society; and automatic debt they pay from the day they are born. The thing is, it starts out that way, and we know it to be true. So, we will always see these incarceration measures as punitive; this validates the current power structure and those who benefit from it. And of course that doesn't "work" (if by work we mean "rehabilitate folks), and of course people end up right back in jail -- our society has figured out a great system to keep these people marginalized forever. Other countries who approach incarceration like rehab (Norway?) see actual positive results from its incarcerated populations---but we clearly aren't aiming for positive results for the poor. We are definitely not interested in this data or we would be doing something about it. Heck, it's cheaper for taxpayers! But we don't want it to be cheaper for taxpayers; we (when I say we, I mean those who voices are heard loudly- the wealthy) want profit to those in power while at the same time, ensureing their power endures because they really don't want to deal with the bees escaping from that jar they have shaken for centuries. "We" hate the downtrodden in this country, "we" certainly don't want them to have a first chance, let alone a second chance. When "we" realize this, those of us who care about this and who definitely don't want to be a part of this kind of a "we" will need to speak out and unify. But too many are unable to see the machinery at work making this kind of awareness more difficult, too many buy into a meritocracy that awards them accolades when it does. I would think engineers and scientists, many of them would have an urge to be skeptical of the criminalization of poverty.