My 150 yr old Victorian has a combination of brick and cement foundation, with brick support columns down the center of the house. (Only 2 spanning about 50 feet)The brick is starting to crumble.

A second floor bedroom has noticeably sagged, and I now have adjustable lally columns in my basement, near the brick and two in the middle of my living room, where the sag shows in the ceiling...

Can these lally columns or even do-it-myself cement block next to/ around the offending columns be enough, or is this major surgery?
Thanks...