Yeah, in theory, and possible also in some practices, but you also end up with an impenetrable mesh of cross-subsidies that raise the cost of some routes that m

Yeah, in theory, and possible also in some practices, but you also end up with an impenetrable mesh of cross-subsidies that raise the cost of some routes that might be economical in their own regard to subsidise other links but not enough to make them solid alternatives. And then suddenly you have to compete with low-cost airlines and bus services that don't have this subsidy complexity and are much more agile - recipe for disaster.