Comment by opo

A big problem with US air traffic control is that you have the regulator regulating themselves. The USA is one of the few countries where the regulator also provides the ATC service. In comparison to Canada, the US government run air traffic control is noticeably less productive and more expensive.

The first proposal to break out the regulation of air traffic control with the provision of the air traffic control was done by the Clinton administration. Support since then has been bipartisan and opposition has also been from members of both parties for various reasons. (I read somewhere that one of the biggest long time opponents of breaking out the air traffic control has been the associations of owners of private jets as they currently pay about 1% of the cost of ATC, but are closer to 10% of the flights in major airports. In reality, owners of private jets can likely afford to pay a more proportional percentage of the costs they impose on the system.)