Reading the threads here you'll find lots of pilots who dream of flying KC-10's or KC-135's, tanker planes!
For all the others on commercial aviation minimum fuel is the rule, and it will always be, unless the oil price drops significantly, which I don't thing it will. So stop moaning about it and go do your job.
Whenever I deemed necessary I take extra fuel, yes. My employer asks me to justify it in the Voyage Report and one line writing does the job, and that's it!
I also find some pilots flying high speed, out of the optimum flight level, using speed brakes unnecessarily and then complaining that the fuel is close to minimus for alternate! A bit of airmanship sometimes helps...