It might be worth shooting for a protection of full pay to age 65, or 30 years, for anyone on property, either the highest scale achieved by the pilot, or the highest scale period.

That would actually be in the company's best interest too, because when autonomous airliners actually start to appear you'll see it coming a looooong way off. Since it will start in cargo first, no pilot in his right mind would take a career job at a cargo airline unless he was over 50 to begin with.

Almost guaranteed that autonomous aircraft, especially any kind of retrofit to existing types, will need extensive "IOE" with a full crew, and then eventually single PM.

So the cargo operators would probably need to incentive recruiting, retention, and stability starting years before and during the transition period.

But with all that said, I still think it's further off for big jets than people think. There's a big unresolved incompatibility between supervision and security, and for a heavy "security" translates to "9/11". You'll need an ability to supervise/control the thing from the ground in the case of abnormal ops, but you need to ensure it can't get hacked or jammed... for those non-techies reading this, there exists NO such comms system which could provide both the security and reliability needed.

Such a system could be built at great expense of course but I also think it would have to be integrated with ATC systems... that's another long pole in the tent.

There's a difference between "can" and "will", the divide in this case is large, and will take a lot of money and structural/regulatory change. Who's going to pay for that? Unlike the pax airlines, whose myopic management focus is always next quarter's earnings, the big cargo operators, plus Bezos, might have the inclination and long view to pull it off. But it won't be quick... they've barely got the FAA to approve drones up to 55 lbs, daylight line-of-sight. You need an exemption/waiver for anything beyond that. The bureaucrats will not be falling all over themselves to drive progress... that kind of progress is all downside with no upside for regulators.

Congress could force the issue, but politics. They forced the issue for small drones, but that was (correctly) viewed as something which could enable a brand new economic sector with essentially zero job losses. They won't be quite so eager to force automation of high-paying union jobs.