Business class flights from Sydney to San Francisco cost A$6k, 6-10x as much as economy. Flights from Sydney to Europe are more like 3-4x (A$7k vs A$2k) but still ludicrously expensive. Good luck convincing your company to expense that for work trips, and most of us don't have SV salaries. Honestly, I still manage to get some work done on long flights, the more annoying thing is flights which don't have power outlets or WiFi.
If you are a point hacker you could spend the points on upgrades (which tend to give you better rates than buying base tickets) but then you're paying for a minor comfort improvement that you wouldn't pay for normally -- which is a textbook example of induced consumption and is playing into exactly how airlines want you to use points.
If you are a point hacker you could spend the points on upgrades (which tend to give you better rates than buying base tickets) but then you're paying for a minor comfort improvement that you wouldn't pay for normally -- which is a textbook example of induced consumption and is playing into exactly how airlines want you to use points.