Your assumption is wrong. Keeping people on poverty wages, dependent on government subsidies is more expensive than employing them. Both economically and socially it's more expensive.
Infrastructure development and a host of other tasks which I've already mentioned and you conveniently ignore. The supply of needed goods and services translates into less poverty, less social instability, more peace, freedom, and better health. etc. Poverty is devastating. When people don't have enough to meet their basic needs, it creates chaos in their lives and in their environment (crime, substance abuse, incarceration, broken families, bad health). Making sure everyone has a job that allows them to meet their needs, acquire a valuable skill, and an education, stimulates economic growth. It's good for everyone.
Airlines aren't nationalized or run by the government. They can become pilots in the military or in some othe government agency. Yes indeed. With training, some of them could do that. How is that hilarious? There are many jobs they can do, I already provided a list.
Capitalists would have to compete with the government to attract and keep workers, and that's good. Higher wages for everyone. They want a desperate working class, that will accept whatever horrible terms are offered to them by their wealthy, powerful employers.