It doesn't. But, if Patient X was prescribed eight of Pill Y per day to manage pain for years, and the person was able to get through life without being in constant pain, that was OK. But, when the new rules were put into place, doctors began prescribing Patient X two of Pill Y instead, and that person who was responsibily managing his/her paid suddently had to "suffer needlessly" because the ground shifted under their feet.
I have talked to several people who have been through this at the doctor's office. They don't prescribe them pain medication with refills ... they make them go into the doctor every month (and pay those fees as well, which is another topic altogether) and get a new prescription. They are made to feel, they say, as if they are doing something wrong by asking for the medication that they have been taking for years without issue. The "two condiitions" are put into place to track people who are abusing the drugs, and everyone else has to jump through these hoops to ensure that abusers can't abuse. But, of course, it does not work and the abusers keep abusing or turning to more dangerous and unregulated street drugs and creating another problem altogether. The more restrictive we become on prescription pain medication, the more people search for alternatives to relieve said pain. Look at the heroine problem that is going on across the country right now, and ask yourself why that drug has made such a resurgence.