Incentivizing dense(r) suburbs is something that could be messaged in a few different ways. In the US, low-density suburbs are only supported by federal funds

Incentivizing dense(r) suburbs is something that could be messaged in a few different ways. In the US, low-density suburbs are only supported by federal funds for infrastructure expansion. If the federal government simply chose to not fund expansions that decreased density then local governments might take on the political burden of selling density increasing investments.