France already does this. And Air France gives you an option to pay extra to subsidize further use of SAF. They will give you an estimate of carbon emissions of your trip, and offer various choices to pay for SAF to offset it. Funding SAF for the whole trip costs about 25% of your ticket pricr.
That does not feel right. It's like being an European and going to NYC and witness the omnipresent tip culture. Now the airlines expect a tip too?
Can highly recommend it, worth a read even if you don't follow all of it. He comes up with tools to measure your progress that will work with any diet you choose.
That's pretty much what many Japanese companies did for a few decades; they would encourage marriage between employees and provide housing so your entire life was devoted to them. Even your own wife (who stopped working) would push you to stay loyal to the company. Obviously that model fell apart once Japanese companies started to fire people...
10 to the 6th power Bicycles = 2 megacycles