It's a good idea, all people will be easy to send money so that aid to poor countries be receive directly. From the other side of the economy can also be utilized for the mining venture bitcoin.
Honestly it's true, with the support of the government it would be possible to help poor nation but they have to sacrifice the current player in the remittance business. With bitcoin it's cheap and fast so I do not find any reason why this should not be supported.
Don't you think that such system when bitcoin will be kind of legalized for international transfers and has support from the government it may affect on bitcoin as the currency and add some unnecessary taxes to such transactions?