Ultimately, the government picks winners and losers with spending/subsidy and taxation. It's not politically feasible or practical to exhaustively enumerate and

Ultimately, the government picks winners and losers with spending/subsidy and taxation. It's not politically feasible or practical to exhaustively enumerate and tax/subsidize the external costs/benefits of various policies. For example, there are numerous positive externalities associated with installing bike lanes(reduced health care costs, reduced noise, reduced pollution, reduced road wear, etc), but it's all at the cost of possibly increasing road congestion. Of course, local governments are extremely unlikely to improve bike lanes at the behest of a single startup. Bike lanes are already extremely unpopular as is, when the primary users are common neighbors and citizens.