instructor rates
There's nothing wrong with the 50 quid an hour rate, it's the lack of hours flown that is the issue.
A realistic full day's work would be 4 hours flown a day, the rest of the time being spent on "unpaid" ground school.
That's 200 quid a day, £1000 a week, 40k a year (allowing for hols and weather).
Being paid a grand a week to do a job you love flying someone else's kit at no financial risk isn't such a bad way to earn a living, is it?
So what the instructors should do is work at places that can provide 20 hours instructional flying a week.
There aren't many of these schools, so one thing you can do is sit around and moan about the lack of work and money. An alternative approach is to get up off your behind and bring some more students to the school at which you work.
Spend all that "spare" time selling your services - make friends with your students, get them to bring their mates along for a trial lesson or intro day.
Build your reputation up, and you'll see the money roll in.
Big Ls