I don't know what you guys expect, but most people already use exactly the servers that the government wants them to use, the ones assigned by the ISPs' DHCP/PPPoE servers. More applications and mobile devices have started to use resolvers provided by Silicon Valley industry heavy-weights, but using your ISP's resolvers was not unusual and they can handle the load, easily. Malaysia didn't ask for the world's DNS traffic, just that DNS queries by an ISP's clients would be redirected to the ISP's servers if the queries were addressed to leave the country. In network parlance this is called transparent proxying, and it's particularly easy with DNS because the protocol is stateless. It doesn't generally break DNSSEC either, just in the event of manipulated responses.