Firstly, we have to view this trend through the lens of economic realities in Metro Manila and the behaviors correlated with them. Millions of Filipinos continue to live under conditions of economic vulnerability, particularly in dense urban areas where informal livelihoods remain common. At the same time, the informal recycling economy remains deeply embedded in city life, as salvaged parts are sold through networks of waste pickers, junk shops and scrap traders.
Within that system, metal has immediate cash value. Steel, aluminum, copper and iron can all be resold quickly through informal channels with little paper trail. A standard cast-iron manhole cover can weigh between 40 and 70 kilograms. Even at conservative scrap prices, that weight can temporarily become food, transportation fare or utility money for someone under financial pressure.