You're not wrong W2P - Lufhansa operates a more complex operation with fewer management and non-frontline staff.
However, that is not the point of the thread; the point remains that costs exceed the competition and the union has failed to negotiate or prepare its membership for a reasonable compromise.
I'm not sure anyone would want the never-ending death-spiral of United / Delta / US Airways to come to BA, but that is the consequence. Service will become indifferent, crew will be unmotivated and won't be injected with young blood, and young competitors will spring up again, picking off the best routes and revenue opportunities.
The cause will be the complex combination of management, union and regulatory failure.
Bye bye BA.