I wouldn't really compare homelessness to being employed at Google and choosing to sleep in the parking lot.
I've been homeless. Long story.
If you've been sleeping in a parking lot and now security has caught on, you're homeless. Are you judging them because they happen to have some money saved up?
People save on rent all the time: crashing at friends, moving in with their BF/GF, moving back with their parents, etc... so this is nothing new and I have no problem with the money saving aspect. I just don't equate it with homelessness.