Sounds good except that you need to remove the commission for the news agent who sold the card. There's also the cost of printing that scratch card, its delivery to news agent all over the country, the cost of making the website which will enable the BTC transaction, that transaction fee and a cut for the scratch card editor to make the business profitable. So I certainly like the convenience of buying BTC cash at a nearby shop, but if I end up paying $20 to get $17 worth of BTC, I'm not sure there will be many people interested. You've lost $3. You could probably reduce that to $2, but you'll need to make a lot of volume...
Why should there be no/less commission for selling bitcoin this way? There is no reason why he should not be compensated for the risk/expense/time of selling bitcoin via token cards. (there is an especially large risk considering that these tokens are especially susceptible to theft while in transit to their destination). It is a free market and the market will eventually decide what the appropriate price will be.
like 5,10,25,50,100 etc.. 
