Keep in mind that this isn't yet a playground for billionaires. None of these companies would exist without NASA, they are glorified apparatuses of NASA. This is actually in NASA's best interest. Without these companies, they would have to do the space launch themselves and bureaucracy would balloon the costs to most of their budget. By delegating this to outside organizations, they can keep the cost of space flight down, while allocating their budget more wisely.

If these companies do anything NASA doesn't like, they would be dropped and disappear over time. If they further get too uppity, the federal government can regulate them out of existence. These companies should be used for what their worth, then when we get what we need, we crush them.