also: a higher fee for bitcoin just means, that a new market opens up: one for other coins which do what the pissed-off users demand. e.g. really fast transactions of small amounts, etc.
If transacting is prohibitively expensive, then Bitcoin might lose users, and the resulting loss of adoption turn to loss of network effect, vicious circle, etc. So it is not trivial to let the fee shoot up, but we are well on the safe side with sub-$1 fees.
Like I said a week ago, in very few applications, is the total transaction cost less than $1 anyway even if the "handing money" part were free (as is the case with cash).