Opinion: Why middle class can't afford rents

``In many cities, demand is so great that there are easily enough high-income renters to support prices well out of reach for the middle class, not to mention lower-wage employees and seniors. And we can expect the imbalance between supply and demand to keep rents high for well beyond the short term... we cannot just build more housing and solve the problem, we need to keep growing, but we also need to make sure that more of what we build is affordable... When developers are allowed to build to heights or density greater than that ordinarily permitted by law, they should be required to share a portion of that new value by including some affordable housing for low- and middle-income renters...''