I see what you are saying Alan but lets be honest here. With all the technology we have at our fingertips it is hard to understand how a plane got ' lost ' .
I mean no offense by this but I don't think people who share your view have a grasp on how vast our world is.
A plane as seen from space is miniscule and I know there are satellites taking pictures of people at ground level, but that is a stationary target and they know it's location to begin with.
Looking for a small white thing in the middle of the Indian Ocean is a HUGE task, technology failed in this case and they had to look the old way, it takes so much time and resources, like they said, the closest point, Perth, was a 4 hour flight away itself.
GPS transponders, etc can fail just like your phone can fail, just because, or simply turned off, no one knows why.
All we can hope for now is that they find wreckage and the data boxes and get some info if a retrieval is possible, lets not forget how many months it took to recover the ones from the Air France crash near Brazil. The money and effort involved in recovering something from the bottom of the ocean is enourmous.
RIP to all passengers and crew, very sad.
PS: To the person who mentioned the transponders that are faultless, many technologies have existed for decades that could save lives in certain situations, but if those situations are so rare then the aviation head honchos don't deem the cost of installing it worthy, a good example of this was the DHL plane that lost hydraulics over Iraq or something and had to land by manually adjusting engine power, to turn and descent even though decands prior a computer version of this system was inveented but was deemed not necessery due to cost and rareness of such an event.