eTickets make it MUCH easier to evade fares.
I don't really agree.
None of this is new or particular to e-tickets. Pay when challenged isn't new, nor is short-faring or doughnutting. In the old days people just used to buy low value single tickets from a TVM just to get through the barrier: at Leeds a 30p child single to Burley Park or Cross Gates was always a popular purchase.
The only edge case is where someone buys a ticket just before approaching a ticket barrier. But if the barriers are usually there people would, in the old days, just pre-buy their short fare ticket. Again, those 30p child singles were always popular in West Yorkshire. If the barriers are an ad-hoc revenue blockade then the people checking tickets can immediately see that the ticket was bought 20 seconds before approaching the barrier.
I can see that e-tickets make it more tempting to accidentally forget where you travelled from, but I'm not convinced it makes it easier.
Things like making e-tickets non-transferrable, other than through a regulated "gifting" process, would also go a long way towards making it so the account holder can be legally assumed to be the ticket user.
None of this changes the fundamental issue: unless you catch someone in the act at the time, you can't prove that the ticket was being used illegitimately.
Take a Vauxhall to Waterloo e-ticket. A spreadsheet of transactions doesn't prove the ticket was used, it just proves the ticket was purchased. Scan data doesn't prove the ticket was used illegitimately, just that it was scanned at only one end of the journey.
So even if you prevent transfer of tickets (and how do you do that for child tickets?) you're no further forward.
it because a requirement for the vehicle owner to identify the driver otherwise it would be assumed they were driving when a suspected offence occured.
But that's not what the law says.
The police can't assume or presume that the registered keeper was driving and it isn't for the registered keeper of a vehicle to prove that they weren't driving. If you are the registered keeper of a car which was detected speeding and you don't identify the driver then you can't be convicted of speeding.
It is a separate offence for the registered keeper of a vehicle to fail to provide the details of the driver at the time of an offence. This is a slightly more serious offence than speeding, which gives most people an incentive to identify the driver, especially if they were actually the one driving the car at the time. But, even then, it is a defence that the registered keeper could not reasonably be expected to know who was driving.