Regardles of weather you think £150 is resonable for a days work it certainly isn't enough to motivate the company to get the planing right in the first place.
If the company payed a reasonable amount of money for days of work, a few pilots would most likely be interested in taking the extra cash, thus letting the rest keep onnenjoying their spare time.
Also, the company would quickly learn to plan better, if you plan wrong it's gotta hurt a bit. that's what's calling learning by misstakes. There is most likely a lot of problems that could be solved with better planing.
that's my 2cents