Yep.
I think the big problem is people have started looking at their credit allowance like everyone used to look at their bank account. As long as they haven't maxed it out, they feel like they've got room to increase it. Instead of having a pile of money that they can only spend until they hit $0, they have a debt amount on a piece of paper that they can only spend until it reaches the number where people start saying no.
People (like that guy with the bike) don't take the time to calculate what things are actually costing them, and they certainly don't even consider buying things outright.
In the states I know they have a "Truth in Lending" section that needs to be on every financing agreement. It fairly clearly outlines how much money you're getting and what it's going to cost you monthly and over the entire agreement. Basically a "cost of borrowing". I wonder if this guy knew he was paying 12k for a 5k bike, and if it would have changed his mind.