Why are Airlines and airports run like buses and bus depots in America?

Question

I just cam back from Asia. I flew Singapore airlines, Cathay Pacific and Thai airways. For starter, the flight attendants are way nicer and prettier than those on US carriers. Food services and on board entertainments are fantastic. Singapore, Hong Kong and Seoul airports are phenomenal . The look more like hi-end shopping malls than airports. We are first world country and why can we have things better or at least equal to those.