*on someone's shoulders
Fig. on someone's own self. (*Typically: be ~; carry something ~; fall ~; have something ~; leave something ~; put something ~.) Why should all the responsibility fall on my shoulders? She carries a tremendous amount of responsibility on her shoulders.
on somebody's shouldersalso on the shoulders of somebody
as a personal responsibility for someone A district attorney has an awful burden on his shoulders. The success or failure of the entire peace agreement will rest on the shoulders of the peace keepers.