SYDNEY (Reuters) -Australia's central bank is considering a slate of new regulations for the payments system to open the use of mobile wallets, make costs more transparent and allow retailers to put surcharges on buy-now-pay-later services. In a speech on Tuesday, Reserve Bank of Australia (RBA) Governor Michele Bullock also outlined efforts to support the struggling business of moving cash around the country and plans to modernise the direct entry system used for salaries and welfare payments. The Australian government is greatly expanding the RBA's regulatory power over the payments system, particularly for mobile wallet services offered by the likes of Apple and Google.