What is the point?

At the train station this morning queuing for my ticket like a good little person, I see a builder type coming up from the platform and walk passed the 2 security guards on ticket duty. One of them eventually shouts him for his ticket (he's already passed them) "didn't get one" well come and buy a ticket from my colleague here "I'm in a rush" and builder walks off. Security guard looks sheepish for a second then shouts "I'll get you on the way back then". Now I'm not expecting security to rugby tackle the guy to the ground (he was a stocky bloke too) but WTF come on, at least put up some resistance "do you want to pay? No? OK that’s fine" is not good enough. Don't let the guy walk away, you stand in front of him and ask him to pay up, if he threatens you then move aside and let him know you'll be calling the police.

Dunno what it's like elsewhere but round here they had a big push 12months ago to stop ticket evasion, it was allegedly costing them a lot in lost revenue. Proper barriers went in at oxford rd which didn't work properly for 6months but now seem better, still rejects my ticket about once a fortnight (and I only take the train once or twice a week). Private security on other stations (G4S). But it's all cobblers, it's not the first time I've seen someone just walk through ignoring the guards and I’ve seen people tailgating paying customers through the barriers. All these measures cost money and if they aren't stopping ticket evasion then that’s an extra cost added on to the people who already pay. Boils my piss it does.