I do understand it, I just don't see it as a problem.
Everyone does benefit from the generation of wealth.
Wealth, or income? Or do you really not understand the difference? According to the data you posted, income for the poor has increased by 18% over the last 30 years.
The data you posted deals with INCOME not WEALTH.
Those tax cuts removed millions of people at the bottom from the tax roles, completely relieving them of their tax burden. And despite your assertion that they were "tax cuts for the wealthy", the Bush tax cuts actually shifted a larger share of the tax burden onto the wealthy.
You've never run a business or had to make a payroll.
What is not sustainable? In addition to not understanding the difference between income and wealth, are you also totally ignorant about income mobility?
People who are wealthy can use the money they already have to purchase investments which pay interest and dividends, thereby increasing their income. As I said, nothing nefarious about that.
