But Rehoboam rejected the advice the elders gave him and consulted the young men who had grown up with him

 2 Chronicles 10:1-1

But Rehoboam rejected the advice the elders gave him and consulted the young men who had grown up with him and were serving him. He asked them, “What is your advice? How should we answer these people who say to me, ‘Lighten the yoke your father put on us’?”

The young men who had grown up with him replied, “The people have said to you, ‘Your father put a heavy yoke on us, but make our yoke lighter.’ Now tell them, ‘My little finger is thicker than my father’s waist. My father laid on you a heavy yoke; I will make it even heavier. My father scourged you with whips; I will scourge you with scorpions.’”

The king answered them harshly. Rejecting the advice of the elders, he followed the advice of the young men.

When all Israel saw that the king refused to listen to them, they answered the king: “What share do we have in David, what part in Jesse’s son? To your tents, Israel! Look after your own house, David!”

King Rehoboam sent out Adoniram, who was in charge of forced labor, but the Israelites stoned him to death. King Rehoboam, however, managed to get into his chariot and escape to Jerusalem. So Israel has been in rebellion against the house of David to this day.

Why?

Rehoboam did not have the heart of love so he listened to the young men who had grown with him. Then he lost the hearts of Israel, and the country divided into two parts, Juda and Israel.

Solomon did not teach his son to be a good king in Israel. So when Solomon is dead, his son becomes worse and selfish even more.

How?

A rich and abundant environment could induce people to forget the grace of the Lord and others' efforts.