I think it's different, and given all of the AGers who see is as a "strategy" worth more than the penalties, I'd say most of the tri world feels that way, too. I'd love to see longer penalty times for drafting offences.

Better idea would be to make the drafters run more. Additional 1 KM for each drafting call.

Raelert wrote on his Facebook page that he wasn't aware of any punishable offence. He wrote he was accompanied by a referee on a motor bike for the whole 90 km.
It's not the first time that pro athletes seem to be baffled by drafting penalties (see also Schildknecht at IM Texas); my perception might be biased (or not) to notice such things happening mainly to European athletes in the US.
Without suggesting anything sinister, I'm wondering what is required in order to be a referee at such a race. How much experience do you need to have before you're riding with the lead group of the pros? How much experience does the head referee have, who briefs all the refs before the race? And please don't answer anyone "the rules are the rules", as judging the gap between two riders is not an easy task. Between "that's clearly less than 10m" and "that's clearly 10m+", there's also "that's probably <10m" and "this may be <10m", and this grey area can be very significant. Don't think of drafting offences as being binary.
I'm not saying Raelert should or should not have been DQ'd, but I'd be really curious to see some video footage of the punishable offence(s). I think it would be a good idea for referees to have helmet cameras.

Better idea would be to make the drafters run more. Additional 1 KM for each drafting call.

"As far as I remember, they did just that in Challenge Roth this year.
They made a point about doing it somewhere far out from start/finish/transition though - in order for it not to become a public shaming. "
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you are right - that is what they did and they called it the K of shame. They also had 80, yes 80, draft marshals on motos....basically 1 per k on the 2 looped course - they were EVERYWHERE! They also worked proactively to prevent drafting b/f a call was made. I had not seen that before and thought it worked well.

Michi just apologized publicly on Facebook to officials, Taylor Reid, and the RD.

After my return from racing the Ironman 70.3 Silverman I honestly want to say sorry and apologize. I made a big mistake finishing the race in Henderson although I had seen a red card which means a DQ. I totally respect the rules of our great sport, the race and all participants. This is why I want to say sorry to the race organizers, the referees, Ironman and the Ironman 70.3 Silverman champion Taylor Reid from Canada. I’m an absolutely emotional but true pro athlete. I traveled the long way to the US because I really wanted to win this race in Henderson and I was shocked to get three blue cards and one red car due to drafting on the bike. With some days in between race day and now, I learned that I have made a mistake crossing the finish line. I would love to come back to Henderson next year to show a great race to say sorry to the race in person. Your Michi