I don’t understand why Europe and USA don’t just pay half the difference between what Russia is demanding and what Ukraine says it can pay.
If Ukraine has to pay only half the increase, they should be able to afford some. And having to pay more than they want will incent them to become more energy-efficient. Right now, they are addicted to cheap energy. Over time, Europe and the USA can reduce the subsidy, and the Ukrainian economy will be forced to become more energy-efficient.