Sound engineers - will you please listen?

I've just had the dubious pleasure of listening back to our performance at Belladrum.  It's... fast.  I don't know if we were keyed up because of the event itself, or the technical difficulties that delayed our start by 10 mins (which is a lot when you've only got a 45min slot), but we're playing like we're on speed or something, and this is unusual because we're not Motörhead.

But the one thing that is annoying me is the fact that the singer has asked for more vocals in the monitors on at least 4 occasions (gave up counting after that, no wait, I think I heard a fifth).  It is clear that nothing's been done - Andy's more shouting than singing and that's because he can't hear himself.  Daryl's harmonica is a bit wayward at times because he can't hear what he's doing.  That's a big problem when you're responsible for the tuning/intonation of your instrument (that includes voice).  It's not so much of a problem for me, playing fretted electric bass.  I have a tuner on the floor and I keep my basses set up properly (intonation compensation at the bridge etc.) so as long as my open strings are in tune then when I stop the string at the correct place, I get the correct note.  I can play the fretted bass visually/by feel and it'll sound OK, but it won't be as tight as it could be as instead of "being one with the rest of the band" (which comprises a combination of muscle memory through practice and being able to hear everyone else) you're either anticipating (which can make you early if you get it wrong) or reacting (which by definition makes you late).  And I don't have to bloody well like it - in fact I hate the feeling of playing in a bubble, where you're playing the bass and have no idea if you're even contributing to the proceedings (hoping to hell that the front of house sound is better than this).

Sound engineers, can you please explain to me (like I'm a four year old - as I have no comprehension of what you do and no right to tell you what to do) why it is that some of you are seemingly unwilling (or unable) to give us decent sound on stage?  We are not moaning for the sake of it, not giving us decent sound on stage is like asking us to gut fish with a butter knife.  You'll have your fish, but it won't be pretty.  All we're asking for is to have a decent monitoring on stage so that we can do our jobs properly.  We are not professionals, but we take our hobby seriously and want to perform at our best for the good people who come out to see us, dance and generate money for the venues that employ you in order that they continue to do this.  If you hamper our performance because we can't hear what we're doing, punters will stay away, and it's as much in your interests as ours to keep bums on seats and feet on dancefloors.