Airlines might be a bad example. Before 1978 there was a lot more control, such as mandating price minimums. Without those you get affordable air travel.
But for airplane companies themselves, I absolutely agree. The FAA had to save money because of their tiny budget, so they had airplane manufacturers inspect their own things instead, with bad results.
Too much government control of the airlines was definitely detrimental after WWII. They couldn't compete on prices, couldn't adapt to changing routes, and couldn't really cost optimize anything. Deregulating the non-safety aspects improved air travel a lot.
There wasn't government control of the airlines, just regulations. Protectionist regulations.
The airlines were still privately owned and the government gave them sweetheart deals and intentionally limited the entry of new competition into the industry, allowing the formation of monopolies of the legacy airlines. There was no incentive for increasing the number of carriers because that would hurt profits, and the regulations helped by making entry into the market even harder.
That problem goes away if you just seize the airlines and run them as public utilities.
Raising operating costs by servicing tiny congressionally important airports would definitely be a thing. And once you've added service to somewhere, you couldn't remove a flight without backlash. To pay the maintainers more, you'd make maintenance more convoluted than it needs to be.
And people voting have a lot better stuff to do than look into airline efficiency. Even tickets costing twice as much probably won't be a very important consideration when people are voting.