The union originally asked for $36 million, according to league officials.
The union, whose lawyers are paid from $29,000 to $60,000, asked for a 15 percent pay rise.
The union is asking for a 10 percent annual increase over three years.
The union has also asked its vice president in Boston to look into the accusations.
The union is asking for an increase to $16,000 from $13,500.
In the strike, the union asked workers at 97 buildings to walk out.
He said the union would never ask its members "to commit economic suicide."
The union asked the panel for a 22.7 percent raise.
"I think both parties are wrong," and the union is asking for too much, he said.
The school board had offered 5 percent increases, but the union asked more than double that.