On Tue, 21 Nov 2006 05:08:02 GMT, David of Broadway
wrote:

James Farrar wrote:
On Mon, 20 Nov 2006 06:08:02 GMT, David of Broadway
wrote:

James Farrar wrote:
On Mon, 20 Nov 2006 02:08:03 GMT, David of Broadway
wrote:

Sure they can. They can implicitly assume that everybody is honest,
barring any evidence to the contrary.
That would require PAYG users to "pay the minimum possible fare
instead of the correct fare for their journey".
Only where they can do the same with paper tickets.

I don't follow this. Can you explain further?

Wherever you claim that (in the absence of a penalty fare) PAYG users
can get by with paying the minimum possible fare instead of the correct
fare for their journey, so can paper ticket users.

No. Paper ticket holders have to jump/follow through two gates, not
one.

Somebody traveling on a paper ticket or Travelcard from an ungated
station to a Z1 station can get by with a Z1 ticket, even if his ungated
station of origin is in Z6, unless he's caught outside his zones.

How's he supposed to get a Z1 paper ticket if he starts in Z6?

And why wouldn't jumping and following not be problems under the current
fare structure?

Under PAYG-users-pay-minimum, a passenger travelling from Z6 to Z1 can
jump/follow at their first station, knowing that when they get to the
final station, they'll only be charged the Z1 fare.

Having to jump/follow twice is far more risky. People still do it, but
fewer than would if they only have to do it once.

What about ungated stations? Jumping/following yields a free ride,
regardless of fare structure.

If it's done at *both* ends, yes.