How about trying cooperatization first, such as forming something like "New York Airports Inc.", with the State as the only shareholder. With that, you can bring some priate co mpany efficiency and autonomy, but you dont have to necesarily privatize it. Way better than the current inefficient mix of local and state authorities!
Why does public transit have to be operated by "Authorities" (Muni, BART, MTA, etc.) - why not doe it like Europe and tranfer operations and ownership to formally private companies in government (city, county, etc.) ownership! Employ the workes as "normal" employees, just as any other private company would (and not grant ludacris salaries, benefits + pensions).
Why not transfer ownership + control of Interstates to a new, government-owned, company (Highway Inc.), such as they do in Europe - more efficient and less expensive.
Why does the Senate have a say in basically every business decision the USPS makes (such as closing post offices - they even have to VOTE in order to rename post offices)?
Why not float USPS Inc. on the stock exchange, while retaining a majority stake?
Europa again did this in the 90s an 00s - look at Germanys Deutsche Telekom; used to be a beurocrats heaven while employees, who were civil servants, enjoyed lifetime benefits - now a global telco (66% in T-Mobile US) while the Government still enjoys a dividend of ca. 1 billion (32% stake).
Everything certainly better than loosing 8 billion a year like the USPS.