Lexus RX 2010-15 :: Suspension Squeak Occurs When Entering / Exiting Driveways

My RXh developed a suspension squeak which occurs during wallowy roads and when entering/exiting driveways. Anything that gives the suspension a good workout causes it. When I brought my RX in for its 30K service, they replaced both struts because they were leaking. The SA also noticed that my tires would need replacing at the next service interval. 30K miles sounds about right to me. He even pointed out that the rear tire closest to us was exhibiting more wear on the outside. btw, these are the dunlops

When I first got the vehicle back, I thought the noise had improved. But it was wishful thinking because its just as bad as it was when before I had the struts replaced. This is a bit of a cause for concern since basically there is a more serious issue happening if leaking struts were not the cause. (btw, I am irked that they put an additional 10 miles on my car while they had it and did not notice the squeak was still there).

Anyhow, now that I have it back, I notice that both the rear tires are exhibiting extreme wear on the outer rim, or toe wear.

Now for the million dollar question. Since the rear suspension is pretty much failing in multiple places, can it be to blame for the abnormal tire wear? I guess it is difficult to say for sure since we don't know what else is wrong with the suspension, but it they are causing my tires to wear unevenly, then the cost of tire replacement should be prorated and/or sold to me at a reduced price. Mind you, I bring my vehicle in every 5 thousand miles and I assume they do the necessary tire rotations.