Indiana Teachers plan suit over financing

The IndyStar reports:

Indiana would become the 33rd state to face a court challenge over how it pays for schools if a teachers union follows through this week with plans to sue for more money.

Union officials want more money for students who are poor, disabled, learning English as a second language or otherwise tend to have low standardized test scores. Educators say their poor performance tends to drag down a school's standing under state and federal accountability laws.
Leaders of the Indiana State Teachers Association argue lawmakers set aside too little money for programs to bring disadvantaged students in line with their peers, even though a state report showed education spending swelled by 69 percent in a decade.

The union here is quite altruistic aren't they?