don't check bag if you don't want pay.
the system "works", but there will be some "blood".
1-airline decreases their fees to kill other airlines, then when out of business, they increase their price back, until someone come and play the same system.
2-airlines become too big, and lose control of costs and his own structure collapses .(ex.:British Airways who will be soon dead, maybe?).
No airline will stay strong forever!an airline is just a ticking bomb!
tic tac tic tac....boum!!!