Why is five Chivo-to-Chivo transactions? Do they think after five transactions, the value of the target address will become bigger and the transaction history is clearer (after 5) so if they want, they can trace personalities better.
I can't speak for El Salvador government but it seems to me that they don't want people to just receive the $30 and go away to forget about bitcoin altogether. They are trying to build the bitcoin economy and encourage people and merchants to start using bitcoin and the $30 acts as the free money to "try things out" instead of just being $30 free money.