Speaking just outside Pittsburgh on the heels of a $1.9 trillion stimulus package, President Joe Biden announced the first of a two-part, multitrillion-dollar push to revitalize America’s infrastructure. One can’t help but wonder if there is any limit to what might be included and how the whole shebang will be funded.

Part one, the “America Jobs Plan,” pegged at $2 trillion, is financed with a “Made in America Tax Plan.” It focuses on what may be called physical capital — roads, bridges, transportation systems, power generation, clean energy, advanced auto manufacturing, the provision of energy-efficient housing, and broadband infrastructure. Part two, which may run another $2 trillion, will eventually address ways to improve human capital infrastructure — such things as healthcare, subsidized insurance, fully funded pre-K through community college education, expanded elder care, and employment for union workers.