Commuting dishwashers should not travel "upper class". That's a well known rule.
"Stiff-lip-upper-class" may conditionally travel "upper class", but not common dishwashers.
An experienced "silver fox" know that the price difference between "upper class" travel and "lower class" travel is minimal. So when the going get's tough, he knows what to do.
If he was Russian "upper class", flashing blue lights and a barking noise would make his way. That's how it is in most African and other third world developing countries.
Our friend is not a "VIP" Russian or an African King (small kind of king) and he fears not making his flight and make an upgrade to "upper class".
Every day the sun rises. Every day the sun sets. Every day the SAS flight take off from Moscow at 15:50 hrs. If you're late, it's too bad. If you make it, you're on. Easy as that!
Does it make any difference which class you are flying? Probably not - not for most of us and some will of course always make it with the right type of card.