I have no idea whether the workers I saw on the roof were legal or illegal. I never said that I thought they were illegal. The border issue should have been fixed many years ago and accurately informed people know that. Kinda weird how it hasn't been fixed over all of these years, isn't it? Makes one wonder how badly people really want the border to be fixed.
Peaked in 2005, on the rise again since 2019. We don't have data over the last two years and while it takes time to gather actual data I'm sure that there are some online "sources" that have magically figured out the stats in real time.
As for your 2nd question, there's already a worker shortage in a lot of areas right now. Seen any help wanted signs? Do you think roofing companies, construction, and the like are fully staffed, able to hire & retain good people as things are right now? There already are market forces pushing for higher wages. The question is how much higher do the wages have to go for more people to put on the long sleeved hoodie & jeans and climb that ladder when it's 100 degrees in the shade?