Been there done that, complete piss take by the agencies.
Sitting around for ages between calls most days, not long enough to go home but not paid either. Trying to squeeze x amount of calls into an hour when Mr A and Mrs C and Mr D were all at other ends of the town!
Oh and the 'can you pick X up at so and sos on the way...' I used to give a lift home to one girl, felt sorry for her as she was lovely but walked everywhere and we often finished late in the evening. But it was out of my way and I never got a penny extra for doing it. It wasnt in our contracts they would just phone you up and say X is doing Y job with you tonight can you pick them up/drop them home? What are you going to say? "No they can walk home in the dark at 10pm?"
You had to claim the milage on your tax form the agencies dont pay you it and only verify the milage to and from actual clients, not picking up and dropping off their staff!
Happy we didnt have to 'meet up to discuss clients' before going to the house, we knew what the client needed and got on with it. We were briefed on new clients before we went. We didnt have time for 'meetings' before we went into the house.
And dont even mention the dirty old men who only wanted the 'young girls' to go to their houses! Or the clients who talked to you like thier personal skivvies and like you didnt have 2 brain cells to rub together because you were only a carer! I put one or two of them right on that matter 
I do remember a few of the clients fondly though. Pity everything else made it a crap job regards time and money.
In view of the horrific comments and attitude of a so-called 'carer' on here I would urge everyone who has a loved one needing home care to vet the person/people concerned very carefully.
This is far more than just annoyance about a colleague requesting a lift.
Get over yourself, if carers were actually valued as much by the agencies as they are by the majority of people they look after we wouldnt even be reading this thread. Carers are treated like crap and expected to just suck it up as we actually care about the people who use the service and often do much more than expected of us, unlike the big businesses who run it. All they are interested in is the £££.