thichi,
well congratulations...you are in the top income class...therefore i am not surprised you like the system. however you should open your eyes to whats going on in the wolrd and in your country.
the median houshold (!) income in the US is 42.000$ / annum! average income of the lower 90% of the population is 33.000$ /annum.
when taking inflation into account that median income has decreased since the late 70ties....while the top 20% of the population are making the gains.
about the life expectancy:
life expectancy exploded in the western world originally because of the extreme decrease in child deaths rates. and since WWII because of a) no wars b) better medical techniques.
in the 3rd world it is very similar...africa gets basic medication (antibiotics etc.) and food supplies from the west which greatly reduces child death rates and deaths caused by epidemics. this does NOT mean the average african is being more wealthy than 100 years ago.