Question of alignment

With all the traveling you have done by air, surely happened to you to notice that the plane’s windows were not aligned with the seats, how come? the answer is very simple: while the windows are part of the architecture of the plane,  the seats are optional choices of the airline and will be added at a later time.
Moreover, very often, the airlines try to make the greatest possible space, placing a larger number of seats than the space allow, which is why you always feel so tight and you can not move your legs! This choice so annoying, is due to the fact that, with the advancement of the financial crisis, companies have opted to add passengers thus maintaining the same prices of the tickets, however, unfortunate that, often, it travels in really uncomfortable way, taking into account that ticket prices are often not so low as they say!