The rich variety of income Middle-class people with only one or two sources. The middle-class people tend not to invest in risky assets makes income often comes from as well as salary.
The income of the rich The middle class has only one or two sources. Middle class people tend not to invest in risky assets, revenue is derived primarily from salary.
The rich variety of income The middle class has only one or two sources. The middle class is often not invest in risky assets to make income comes from salary is a principle.