45k is a huge amount to me, and something I don't think I'll ever acheive!
It is all reletive though, I'm from Cornwall which is a very low income place, most work is seasonal. I used to work 96 hours a week during the summer and half terms and be out of work the rest of the year. Coming from that background I see what I currently earn as HUGE- I earn more than the rest of my family put together, my parents, and two siblings working fulltime.
My earnings go further as I don't have dependants, but on the other hand don't go as far as some peoples as I live in Richmond with very, very high rent, bills, and council tax.
I'm a nanny so my income is dependant on two other people's income, and their outgoings. If school fees rise a lot, or one of them loses their job or whatever, maybe they'll get rid of me. My income isn't guarenteed!
Oh and to actually answer the question- I earn about £30k but I get a meal a day when working, sometimes two as the parents like me to eat with the children to teach them.