People have been campaigning for 'London style contactless' to be extended further out from London for years.
Which people? A minority...? Do those campaigning for or supporting a further roll-out do so understanding the risks of an Incomplete Journey Fare? Was it explained to them a likely consequence would be to increase the level of that charge?
Ultimately, what should the incomplete journey charge fee be?
I think the Overton window needs to re-widen.
I'm no expert at all but isn't TfL doing a few things to increase the chances of an Incomplete Journey Fare: leaving barriers open, removing fairly-priced paper tickets, and now making it more difficult to correct a journey?
People can clutch your pearls and point out that food on a shelf is not an invitation to steal and people should be perfect at all times, but barriers for a very long time have served as good human user interface to force collection of a fare. Travellers are busy, hot, in a rush, etc. It's also easy to miss a touch-in/error during rush hour.
Frankly they should take the fare-dodging on the chin as a result of all cost savings or increased revenue they are getting from increased contactless (the only 2 reasons they would have done it), or bin it if the risks are too high, and not inch towards routine penalty-faring of well-intending customers.
You could also argue the penalty fare should be £500 because you can arrive in peak times from an open station 250 miles away, travel in First, somehow avoid ticket checks then exit via a contactless barrier.
To me it's stretching beyond its usefulness as a mechanism to avoid fare dodging. There is already too much snakes-and-ladders in the rail network.
£34 could quickly turn into £68, then £126... a large enough amount – coincidentally – to cover quite a few shorter journey fare dodging...