[betterunix2]

"assuming one is fortunate enough to have enough income to even have savings"

This cannot be overstated enough. In the USA a myth has developed about "personal responsibility" in which people have a choice, they can save for retirement or they can spend their money on other things; we tend to forget that for roughly half the country there is no such choice because just paying for basic living expenses (food, shelter, clothing, and transportation to a job) will leave nothing to save. People bought the myth and allowed defined-benefit pension plans to be replaced by IRAs and 401k plans.

"Which cause the rich to get richer, and the poor get poorer."

The rich should get richer if they are compounding their investment returns over time. The problem is that for more than 40 years America has been in the grip of politicians who have attacked government programs of all kinds, insisting that we cannot afford to pay for anything that benefits the poor while also insisting that we have to cut taxes on the rich (naturally, the tax cuts also benefit those very politicians). The fact that the poor cannot invest (for lack of capital) is not the reason they are getting poorer; they are getting poorer because for decades we have reduced the scale and scope of government programs that benefit the poor (or that benefit everyone equally).