Dartagnan,
When considering a career change, individuals must move into their new career with open eyes, and be aware of any risks. To say otherwise is stupid. Just because people don't earn as much as they think is not an excuse to jump up and down and sulk.
I'm well aware I might be working for peanuts for my first 6 months. I have weighed the risks, and I am lucky that I am a 22 year old, single man living at home. For someone with a family, a house, bills and an expensive wife, perhaps TR's aren't the way forward. Different people will have different routes into the industry.