In reply to Tyler:
I deal with courier drivers daily. Many of them sub contract to large companies such as UKMail or DHD, they seem to be on the shit end of a stick to me and not earning minimum wage. e.g. A DHD owner driver told me she gets two weeks holiday a year, i.e. DHD arranges cover, if she wants more, she has to arrange and pay for cover. So to have a week off is a double whammy of losing a weeks wages and paying another driver to cover for her.
I know another bloke who specialises in moving motor bikes. He bought a new or newish van and he is busy and makes a fair wage, however he did tell me he is not putting enough aside to cover the deprecation and buy a new van when the current one is knackered. So he is earning a wage but his capital investment is being lost.