From the Devil's Kitchen:
Ministers are banned from using air miles accrued on official trips, and are expected to put them towards reducing the cost of future ministerial travel or donate them to charity.
Why would you donate air miles to a charity? Such as one that caters to the homeless.....
.....unless the idea is to send your homeless winos somewhere on a one way ticket, such as Uganda (assuming you can get a ticket on air miles to Uganda). Otherwise, I guess you just ship them off to Romania.
And if they want to come back? Well, have you ever tried booking a seat with air miles? They'll be away at least six months before they get a seat back.