To promote increased use of port facilities in a major coastal​ city, a state government has decided to construct a​ state-of-the-art lighthouse at a projected cost of​ $10 million. The state proposes to pay half this cost and asks the city to raise the additional funds. Rather than raise its​ $5 million in funds via an increase in city taxes and​ fees, however, the​ city's government asks major businesses in and near the port area to contribute voluntarily to the project. The city is likely to face problems in raising the funds because