哪位大侠帮我看一下这句子的语法结构

Far from a kind of charity they once weret是短语作状语，其中主干是far from charity, they once were 是定语从句修饰charity，they指代senior citizen discounts
主句是senior citizen discounts have become a formidable economic privilege to a group with millions of members ，who don't need them是定语从句修饰members

全句的意思是：老年人折扣曾是一种慈善之举，但与此完全不同的是现如今它已变成了给众多并不需要它的人们的一种令人头痛的经济特权。