Housing makes that very difficult. Throw in some kids (daycare, summer camps, sports and music enrichment if you want them to have a chance in dog eat dog world) and you need big $$$ to hit 50%. I mean 30% goes to taxes right away!
If you have the means save aggressively, you may well be able to retire 10+ years earlier than the standard. Yet millions people are foregoing a decade of freedom in exchange for the fleeting satisfaction that comes from having marginally better stuff.