This refers to not knowing who one is working for, or having doubts about the meaning of the work one does in an organization.
There are also people who feel unable to grow up, or are unable to go to work.
This applies to many people in their late 40s.
誰の役に立っているか
Dare no yaku ni tatte iru ka
who one is working for
わからなくなる、
wakaranaku naru,
not knowing
組織
soshiki
(an) organization
働く
hataraku
(the) work (one does)
意味
imi
(the) work (one does)
ことです。
koto desu.
this refers to
成長している
Seichou shite iru
to grow up
実感が得られない、
jikkan ga erarenai,
(who) feel unable
出社できなくなる
shussha dekinaku naru
are unable to go to work
40代
Yonjuu/40 dai
forties
迎える
mukaeru
(this) applies to