The problem is that when government involves private company, the resulting quality of work deteriorates down to typical government work.

One example is fraud prevention. Fraud hurts e-commerce badly, and the government would have been in great position to identify and prosecute fraudsters (fake credit cards etc.).

But government agencies are so inefficient and lazy, that they even discourage sending fraud data to them.

My biggest concern with government abuse of power in airports is not violation of privacy.

It's travelers time and tax payers money wasted for nothing.