There is no data on how many people don't choose to teach because of the perception of low wage and poor working conditions. I'm not even sure how you would measure that. I also can't think of another profession that has the same reputation. Most jobs have a reputation of either poor working conditions or low pay, or if they have both, are unskilled or low skilled positions. Teaching is the only job I can think of with low pay, poor conditions, and high skill required (a bachelor's+credential or master's degree).