When Yisrael come to Mitzrayim Paro gives them "the choice land of Goshen" Bereishis 47,6 which is also called "Raamses" Bereishis 47,11. Later a new king Paro who doesn't recognize Yosef (who saves Egypt from famine) rises and enslaves them Shemos 1,7, but apparently lets them keep the good land, because they're still there during the plagues until they finally leave Raamses Shemos 12,37 on their way out of Egypt.
I would expect someone who enslaves a people, and who makes their job deliberately difficult as this one did by taking away the straw, to also deprive them of the best land (and perhaps of their flocks and other property as well). But that didn't happen.
Should we expect Paro to take away their land and flocks, or was that not how slaves were treated in that time and place? I'm wondering if I misunderstand how these things work or if we're seeing the divine hand in protecting them.
None of the chumashim I have access to comment on this. The question came up in my congregation's torah study recently.