You keep prices down and revenue up, by lowering the costs of production & labor. That is the main reason why we have so many sanctuary cities, inviting in migrants to do jobs at below normal wages. Unfortunately, in a capitalistic society, not everyone can be in a particular class. So those whom are in the same class as the migrants, low skill, no skill wage earners, must compete with those people for the same jobs. That includes a lot of my ethnicity, but is not limited to only mine. The larger the labor pool, the easier it is to clamp down on the cost of labor. Doing that comes at the expense of the labor force, which in this case is at the expense of American citizens to draw in non-citizens who will do the work for significantly less.
This intentional reduction in labor cost at the expense of American citizens is being publicly spearheaded by Democrats (policies), and privately supported by Republicans (businesses). So both are intentionally contributing to the problem, each playing their part, giving an illusion to the masses of American citizens that they are on opposite sides of the migrant issue. Look deeply enough, below the surface level speaking points, and you will see they are of the same accord on this issue, in my opinion.
