Thomas' comments come in the wake of All-Pro wide receiver Josh Gordon receiving a one-year suspension for violating the league's substance abuse policy. Gordon can apply for reinstatement next year.
"Obviously there were some oversights when they wrote the program and some cultural changes that have happened, so that the program doesn't accurately reflect the morals of society today," Thomas said to USA Today.
Thomas, a four-time first-team All-Pro, said the length of league's CBA could be an issue when deciding punishments.
"The problem is, now you're sitting in a situation with a collective bargaining agreement that lasts 10 years, and in the middle of it, no one is going to want to go back and try to hash out things that may be an issue — as they clearly are on some levels."
- Scooby Axson