The problem you are referring to is solved already - it's called frequent flier miles and free upgrades, or paying for the additional space. Elite status with

The problem you are referring to is solved already - it's called frequent flier miles and free upgrades, or paying for the additional space. Elite status with United means you are almost definitely going to be 'economy plus' at the least, which means extra leg room etc. For me it means I am almost definitely going to be upgraded to business class for free because I usually outrank most others on a flight.