I can understand PD's reasoning why they don't want to increase payouts and would rather drip feed the player community. In that way, they know it will take the majority of players ages to obtain all the cars in-game (unless they are young and/or jobless and have no life outside of gaming ) and so they will continue to grind through gritted teeth just to get that darn, pesky McLaren F1.
Plus, Kaz came up with the genius Idea of rotating 'rare' cars via the Hagerty dealership. As he said, he wanted to truly make players appreciate the work and effort required to obtain these cars (even if only virtually) The idea that players will appreciate these cars more once obtained is laughable. When I finally grinded enough to get the 911 Strassenversion, I didn't jump for joy. Rather, I thought '"Thank **** for that"