What is the ruling on the pension, end-of-service bonus, and insurance for my mother who left her job at usurious banks and now has no income?

Your mother is not permitted to benefit from the bonus money and the insurance refund because it is ill-gotten wealth acquired from working in a usurious bank. However, she is allowed to take it to spend it on charitable causes and to dispose of it, such as by giving it to the poor and the needy.