Let me explain with an instance in the 《Miscellaneous Treasure Sutra》.
When King Pasenadi (6th century B.C.E.) lay down to sleep, he heard an argument of two internal officials.
A said, "I live by the king."
B answered, "I don't rely on anyone, but live by my own power of karma."
After hearing it, the king agreed with the official A in mind and wanted to reward him.
First the king sent a person on duty to tell the queen, "I will dispatch a person to you today. You give him a lot of money, clothes and precious necklaces."
Then the king immediately sent the official A to take the king's remaining wine to the queen.
When the official A went out with the wine, he had a nosebleed and couldn't go any further. Just at that time he met the official B and asked him to take the wine to the queen.
When the queen saw the official B, she recalled the king's words and gave him money, clothes and necklaces. Then she sent him back to the king.
When the king saw the official B, he was deeply astonished and confused. He immediately called the official A and asked, "I dispatched you. Why didn't you go?"
He answered with the facts. (same as above, omitted)
The king then sighed and said, "I am now aware that the Buddha's words are true. Who makes the cause bears the effect. It cannot be taken away."
According to this, good or evil results come from one's own actions. They cannot be given by gods or kings.
First of all I have to clarify that karma includes both good and evil actions and their effects.
The instance tells us that we live by our own karma.
The karma includes those made in the past and present lives.
Therefore, the children are born with their own karma made in the past lives, including wealth.
This shows that "孩子帶財來" is right.
They bring their own wealth for themselves.
But before children can make money, they must acquire their wealth through the parents.
Therefore, the parents' income may increase.
However, the karma is very complex. We cannot consider only one aspect. For example,
a. How much karma of wealth do the parents have?
b. How much karma of wealth do the children have?
c. When can the wealth be obtained?
d. Were there any debts between parents and children in their previous lives? Who owes whom?
e. There may be more karma that we cannot think of.
Taking into account these factors, there will be a lot of different situations.
- Both parents and children have effects of richness:
After the birth of children, the parents' income can increase obviously. And they are also willing to spend money for their children. The children will then grow up in a good environment.
These parents are usually in favor of "孩子帶財".
- Both parents and children have effects of poverty:
After the birth of children, the parents' income will not increase apparently.
If the parents' karma of poverty happens to take effect in this period, their income will even reduce.
It's not caused by the children, but by the parents' own fruits of karma.
As a result, the children will be raised in a bad environment.
This is the children's own effects of karma.
These parents are usually those who deny "孩子帶財".
Certainly there are more situations.
I cannot explain all of them due to the limited space and the complexity of karma.
Leave them to the smart you to think about.
Some people may ask, "How to increase the karma of wealth?"
The answer is very simple, and that is, "Do more good deeds and help those who need help."
The one who makes the causes, bears the effects.