Bane wanted them to look after him and keep him alive so that he could watch Gotham City get destroyed on television. He never expected him to be able to escape the pit.Scarim Coral said:The only recent "why" I can think of was watching The Dark Knight Rises last night-
Why did that guy and that blind guy help Bruce recover when Bane put him in the pit? Since Bane own the pit couldn't he threaten the inhabitants that anyone that help him will be killed?
I admit however I wasn't paying attention to some part of the film so I may have messed some info out.
"And once Gotham is in ashes, then you have my permission to... and you know the rest."