Picture a setting similar to that of many fantasy works: a relatively low level of technology among the general population, lots of manual labor, agriculture or hunter/gatherer society, and that most people are generally content with the way of life. Note that this particular world does not have magic.
Now consider that in the world just described, there's also space travel by means of technology (in other words, not too dissimilar from what we are doing in our real world as of today) on some non-negligible scale.
Also assume that the general population is fully aware that such space travel is going on, and are generally either indifferent to it, or actively support it.
Now consider that space travel is, on the whole, freakishly expensive.
How can I explain, in-universe, that the general population doesn't revolt against the space program of their world?
If desired, you may assume that the whole planet, as well as any other planets that may possibly harbor life and are reachable by their spacecraft, is largely similar in terms of lifestyle and technological capability. You may also freely assume the opposite, should you prefer to do so. Please specify early in your answer which approach you take.