Companies really ought to pay for business class on transatlantic and transoceanic flights because of well-founded research showing that a seated position without movement for long periods of time creates a risk for DVT/stroke and that it interrupts sleep which has poor health effects. Unfortunately there's no legal mandate to require it, but a lot of European companies have rules for flights where a single leg is over 6 hours or over 8 hours that triggers an allowance for business class. I'm unsure about BMW, but it wouldn't surprise me if they do this.