Yes, Koreans are very busy.
They are always working.
My father too. Many people think militery officer is can't see there family very often. =Many people think military officer can't see their family very often.
But it's not true.

Everyday come home, and maxium early come home. =They go home everyday and the maximum time to come home is early.
However korean is busy.
Because everyone must learn money..= However, Koreans are busy because everyone must earn money.
When they work hard, they can't learn money very much

But more than little work. = When they work hard, they can earn money more compared when they have little work.
So people work hard.