I don't disagree with your sentiments. So much of this Covid overreaction is complete BS. IMO, you appear to have a bigger aversion than most to spending $$ on food. What's a "normal meal"? Don't get me wrong, I'll take full gubmint rate per diem but I won't hold my breath on that.

You clearly need to develop the appropriate appreciation for 10-year old episodes of the Mentalist and NCIS. Come-on!

Some general comments not directed at anyone particular:
I'd love to see some kind of premium pay to account for the extra a$$-pain we're still experiencing in many international locations. But, the bottom line is that most foreign governments are still requiring quarantine for new arrivals. Our employer is bypassing that requirement by agreeing to isolate us while we stay in their country. The fact that the available food is expensive or the TV choices suck doesn't really answer the OP's question. There is no valid reason for violating the restrictions agreed upon by accepting the trip and processing into Japan.

Let's assume for a moment that the restrictions are valid and cannot be lifted. If you believe the news, the US cases are on the rise which probably makes it even more difficult to convince a foreign government to cut us some slack. The only thing that might make the situation more tolerable is some additional pay to recognize the added sacrifice that is routinely being accepted by our pilots. But as long as the freight moves, why would our employer add more incentive?
If everyone flew their line, avoided AVA and VLT, declined draft and enjoyed some time at home it would be a matter of days before additional incentives were offered. Our union reps wouldn't even have to ask. Put the crack pipe (draft pipe) down and temporarily walk away. It's not a difficult concept.

But we apparently have complete idiots working for our company. There are guys with 10-12 weeks worth of solid blue lines on their calendar making 200% every day, who actually have the nerve to then express public concern about their health and safety due to being confined to their rooms on layovers. They actually want our union reps to go to the company on their behalf and play the "health and safety card". Hey - dumass - if you were really concerned about your health and safety, you wouldn't be volunteering to do it for 3 months straight. You want to make a general complaint that being locked in your room for 48-hours sucks, go for it. I'm thinking the company is going to turn a deaf ear to that because, 1) - they're paying you 200% to deal with it. and 2) The freight is moving as a result.

Meanwhile, there are plenty of pilots just flying their line at straight time who don't want to work 95% of the month and would like to have some monetary recognition of the huge number of unpaid duty hours they spend processing in and out of country X, Y or Z. They'd like some incentive pay to recognize the sacrifices they make by spending days confined to their rooms or hotel grounds. But the "it's all about me crowd" will never let that happen. They'll keep picking up AVA and draft and move the freight, completely unable to recognize that a temporary halt to that would bring on additional incentives for everyone. Then they could go back to whoring themselves out every day of the month just like they've been doing all along.