Let's not forget the most important thing beer brings, ...patience!Beer brings friends, friend lift tank off stand onto the ground, Mike can fix tank without having to climb in, there's your efficiency right there! If the beer is cheaper than the taller ladder, there's a cost saving as well, and now that Mike does not have to get into the tank, thus eliminating the risk of breaking the tank and injuring himself, there's a reduction in risk as well.
To recap, beer improves efficiencies, saves costs, and reduces risk. Yeah beer!