For years, modern aircraft have been built to withstand birdstrikes through a process called birdstrike certification. Both the aircraft manufacturers and the engine manufacturers test their product. I don't feel like looking it up, but I recall modern engines being tested to a 4lb bird @ something like 400+ mph. Other parts of the aircraft--fuselage, windscreen, tail fin, etc.--are also tested to certain standards. The fan blades of newer engines were also redesigned to be more flexible, so that they flex and bend then return to form, rather than break free, upon impact.

Your claim that the airline went cheap and didn't buy engines that meet these standards is false.

Now, all that said, US 1459, AFAIK, flew into a flock of geese, not just a single bird that hit a single engine. This is an extreme case.

Videos on bird strike testing HERE

Other bird strike articles (a good Scientific American article) and links HERE

If you would like to believe that US Airways has made decisions causing its aircraft to be less safe to birdstrikes without any proof, that's your choice. But I believe the onus is in you in this case, as you're the one making a baseless accusation.