Guesting is already quite restricted. The following people get free guests:
- Executive Members (including DMs that spent two choice benefits for an executive membership) (2 guests)
- DMs that spent one choice benefit for a credit card guest pass (2 guests)
- SkyTeam Elite+ traveling internationally (1 guest), and this is SkyTeam policy so it seems unlikely to change.
Folks getting access another way can pay $39/guest for up to two additional guests.
The guest passes on the Reserve were added recently, I'd guess in response to customer feedback that some folks want to take their spouse/family members with them. I'm not sure what you could cut that would make a huge difference.
Build more lounges. Open pop-up Sky Clubs. Try grab-and-go like some other airlines. Airport space is tough to get, but given the revenue that airlines seem to make from lounge credit cards, they should be able to do something.
Are the Executive memberships and DM choice benefit guests really limited to two now or can these people still bring in their entire families?