The civilian aircraft control system has been chronically underfunded for decades, since Reagan fired PATCO. One of the things they were on strike for was for better equipment to do their jobs better, easier, and with less stress. Even in the 80's, the computers and radars were dinosaurs best kept in a museum. Upgrades since then have always been a day late and a dollar short.
The airspace above the US is the busiest in the world, and it's just getting worse. They don't even report near-misses anymore to the media unless the pilots can see each other giving them the finger. They're that common.
Nothing will be done until 3 or 4 planes do a mid-air and the public outcry is so bad that people are ready to march on the FAA's office with torches and pitchforks. Then there will be a massive round of public firings to appease the crowd, a slight boost in funding to the FAA, followed by further deregulation of the airlines.
Personally, with all the deregulation already, I'm surprised more planes don't shed parts along the way.