Another allegation of discrimination by Tiger Airways

Another family with a member that uses a wheelchair is relating a story about being refused boarding by Tiger Airways. The son of the woman who was refused boarding told Channel News Asia: ""The counter staff asked whether my mother could climb the stairs to the plane and walk. We said she could walk but would have difficulty in climbing up the stairs. The counter girl then said that if the pilot saw us, he would reject us. We were not given permission to board the plane."
What is wrong with the captains on these flights?(Photo by Eduardo via morguefile.com)