The bankruptcy court judge, Robert Drain, said he approved the plan including immunity for the family in part because it was unclear whether the Sacklers could be held liable and uncertain if judgments against them could be collected.
The family has used trusts organized in the Bailiwick of Jersey, in the Channel Islands between England and France, among other jurisdictions, to hold their wealth, according to McMahon's opinion.
Bickford said any plan without Sackler funds leaves Purdue with less money and victims with difficult legal claims.
"Essentially everyone takes a haircut and then we pursue the Sacklers for 100 years," he said.