The more you are given, the more you are requested to contribute.
This teaching of Christ Jesus gives an answer to the question why God let the gap between the rich and the poor expand in human society.
If you earn $1, you have to contribute $1 to the society. If you earn $100, you have to contribute $100 to the society. If you earn $1 million, you have to contribute $1 million to the society. If you earn $1 billion, you have to contribute $1 billion to the society. For this premise, God allows men to be rich momentarily, since they would soon become as poor as others after such contribution.
But the underlying condition is love to others. Without love to neighbors and the society, rich men will not contribute as much as possible to the society.
Being rich means to see the poor suffering due to a lack of money. While they have money, they have to see the poor suffering due to a lack of money. If a rich man has love to human beings, he or she would help the poor. If he or she gives money to the poor but he or she is still engaged in a social system that generates poor people, his act is useless. So, a rich man who has love to the poor would stop sustaining social structure and systems that allow him or her to become rich but make some others poor.
So, the true charity is not donation of 10% of one's wealth but 100% of one's wealth. If a rich man become truly poor after donation or dispensation of charity, he is following the teaching of Christ Jesus.
It also applies to businesses. Complete charity is what is required for them.
APPENDIX: Ranking of Countries in Terms of Added Values in their Financial Sectors
14. South Korea
21. Saudi Arabia
22. South Africa
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Mat 6:20 But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal: