16% is still an astronomical pay rise in anybody's book!
And all that for sitting on their arses doing nothing (quite literally) for 90% of their time on duty, which is only 50% of the time (4 on 4 off) - 90% of 50% is not alot...
Comparisons with Tube drivers are pointless - thanks to arch-trotskiite Red Ken, they get paid a small fortune for sitting there all day and pushing 2 buttons - one marked "GO", the other "STOP".