I think people are underestimating the way 'loyalty' programs work.
If you are a WP, you are more likely to book travel with QF, due to the enhanced benefits you receive. By having more WPs, QF are in effect increasing sales due to this loyalty factor - why would I go and start from scratch on Singapore when I already get benefits from QF?
I got the double SC promo, and did fly more because of it, earning QF additional revenue. This got me to WP for 19 months (was happy at SG), however next status year I will easily requalify as I have forward bookings all on QF - not the cheapest, however I chose to fly QF due to my WP status. They win. I win.
I personally agree 4 sectors is too low to be considered a 'frequent flyer' at any level of the program.
Everyone keeps whining about anytime lounge access, but I would suspect that less than 1% of WPs would actually use this benefit (most appear to be on AFF). Personally, if I'm not flying, why the heck would I want to be in an airport?
Most of my pickups/drop-offs are at T2 anyway, so no J lounge regardless.
In addition, do you think the J lounge staff are going to start scrutinising boarding passes closely? They're far too busy, nor would they really care (attitude can be an issue at times - not as bad as QP staff however). Flash your card - you will most likely be in, or use your guest's boarding pass and your card.
As far as cost saving measures, I can't imagine this is a particularly costly benefit - although there are probably some that abuse it - like those I hear on AFF that make a trip out there on Friday nights for free booze :shock: -frankly I'm glad this is coming to an end, they clog up the lounge for those of us actually travelling...! Who'd have thought top tier members and premium pax could be so cheap. I suppose class can't be bought.