Of course they are, because they already are compensating them plus contract management overhead on both sides of the contracting arrangements (which are usually made even greater because they have different contractors for different phases of an effort), plus contractor profits.
Aside from simple corrupt motives (both by responsible managers involved in deals directly and higher-level politicians who favor inefficiency of kicking things off to industry because it buys support from the beneficiaries), this is done because it spreads the blame in the event of failure, which is seen by many involved as more important than maximizing likelihood of success or cost efficiency.
But citizens (well, at least those not corruptly benefitting) shouldn't tolerate that.