If migrant agricultural workers are essential, why are they so often treated as disposable?

When the COVID-19 pandemic unfolded, she observed a stark contradiction in how the government classified migrant agricultural workers as essential while often treating them as disposable.

“The federal government allowed migrant workers deemed critical to the food system to enter Canada, but the policies put in place to protect these workers were inadequate and failed to consider the social determinants of health faced by this population," says Mayell.

    https://isi.utoronto.ca/story/migrant-agricultural-workers-are-essential/