These costs can be covered either by direct subsidies from Governments or by rising block tariffs that require the more affluent to pay higher fees thereby providing below cost service to the poor.
这些成本可通过政府的直接补贴或提高大家税率来承担，就是要求较富裕者支付更多的费用，以便以低于成本的价格向穷人提供服务。