It used to be that you could pay your debt, and unless your crime was infamous, the "memory" of it would fade from society rather quickly. The internet and private databases have definitely hampered this facility and perhaps it should just be regulated with the same forthrightness we apply to credit decisions.
I have a relative who spent time in prison because she tried to kill her mother with an insulin injection who got out and got a job as a nurse working at a nursing home. She lied on her job application about felony convictions but only got found out when her mentally retarded sister showed up at the emergency room with an insulin overdose. It said in the paper she was stealing meds from the controlled substance locker and I believe it because she was stealing her grandson’s ADHD meds too.
I believe we should give felons a chance but the above case is one where not doing a background check looks like malpractice.