We do have a chicken and egg problem. I think the idea here is that it's a systemic issue and the enforcement is focussed on individuals. This is analogous to the concept of getting everyday people to recycle when the companies creating the products have greater control over how much garbage is produced.

Employers need to stop taking advantage of undocumented workers at artificially suppressed wages. This has acted like a subsidy keeping these poor business models afloat. This has led us to the situation we are in now, where we've become dependent on undocumented migrants (food production etc), who we are being taking advantage of (lower wages, less rights), and also trying to villanize & deport them (the article above). All simultaneously.

It's possible with careful coordination of industry, legislation, and immagration, we wouldn't be here. But now that we are, we need to either find a way to improve the situation or reverse it.