The franchises may not make much money but my points are that a) they are maybe 2 dozen out of 200 companies on the current railway, and b) there is a parallel army of highly-paid hangers-on siphoning money out. I think it is this hidden world of money making that explains the otherwise inexplicable (suicidal) devotion to PFI which is bankrupting lots of hospitals and schools etc.
Most of the groups I described did NOT feature in the railway 40 years ago - a fact, unwelcome as it is to the cheerleaders for the current structure:
1) There was no place for any of the "big 4" or other accountants, there was a BR audit department - on standard rates of pay.
2) there were no bankers lending money for investment, it was given by govt. because the investment needed doing, and if taxes didn't cover the cost then govt could borrow more cheaply than any commercial loan.
3) the money middle-men didn't exist. A relative of mine more recently had a very-highly paid job in a firm in the city which existed simply to source money for PFI and similar contracts
4) There was no insurance. BR had lodged a bond somewhere and even the cars had no insurance as such (so it was easy to overlook MOT Tests - as we found out, luckily with no adverse consequences!) I think there might have been proper employers liability (to staff) insurance however.
5) Every company in the industry as it is now has to have working capital - borrowed from a bank at a "commercial" rate of interest
6) Every company has its directors etc. rather than one actual BRB and all the layers below being working managers.
7) there was no need for the million contracts between players as there are now. Even if each of 200 players had just 1 contract with each other player that's 40 000 to be drawn up, managed, scrutinised etc. I have just counted about 690 companies listed on
http://www.railway-technology.com/contractors/indexAtoZ.html - BR had to buy things like cutting wheels and diggers, so even if half of the current list are doing things that used to be "internal" that is 120 000 potential commercial relationships.
I know that contractors were used for big infrastructure jobs, and they would have had all the ancillary trades needed to run private companies, but it was a relatively small part of the railway.