Money flows in very complicated ways and "shareholder's choice" is a technicality, especially in a world filled with monopolies, oligopolies, natural resource speculation and extraction, broad-based index funds, government subsidies, regulatory capture, and all manners of rent-seeking.
Economic deadweight is economic deadweight, no matter the source of funding: whether its a 30 year old widower of three at the grocery store cash register paying their dues to the oil barons who happen to own the land above which the oil is pulled, or the 50 year old executive who pays a 16% effective tax rate to ensure that the speech pathologist has their own office at the local school to help a child learn to cope with their stutter.