Wouldn’t they benefit from more people? Of course it would come with the condition of learning the language at an acceptable level and that being tied to residency.
The problem is that most of the growth goes to the already rich as they pay immigrants poorly and make them pay high rents (hence the need to have multiple families living in a single unit). It’s still a death spiral, just with higher profits for the rich few. The only way to make it not a death spiral is to force the rich leeches to stop sucking the blood out of everyone else.