Remittances may increase substantially as a source of development finance in the future (see chapter 10). At present, however, even if important to many low-income countries in macroeconomic terms, transaction costs for migrant workers and families to wire money to relatives back home remain high and incentives and mechanisms to channel resources to developmental investments tend to be weak in most countries. A more complex issue (because of its political ramifications) is arriving at a proper international framework to guide the international mobility of labour.