what do you mean when you say things like "If it doesnt ever fail "

it absolutely has  to fail if you look at the numbers

if it keeps going on like this in less than 2 years all the bitcoins in existence will have been paid out in interest alone  INCLUDING the ones that havent been mined yet  

double any number every 3 months and see how fast you get to 22 million and you will soon understand why its impossible