Since the government can borrow money at 0%, can I suggest that it buys all the aircraft from EZY, Tui etc. As flying gradually restarts the frames can be dry-leased back until they are in a position to buy them back.
I would have two conditions. The airlines must pay the airports the fees they would have paid per their original timetable, to ensure that the airports survive.
And since these companies will have little or no turnover, the senior management should be paid on the same basis as their employees until they have a job to do.