excavate around the foundation, dry the wall, paint with sealant like tar, dig under the base of the wall by 6 inches or so, place architectural-sheeting from above ground level and tuck under the base, do that all along the wall, sealing the architectural-sheeting together per manufacturer spec, the re-bury it all. Do this along any side of the house that is on the uphill side, or just do it on all sides. Carefully fold and seal a piece around each corner of the house foundation.

also, not sure how it was told to you, but no, you are nto going to reduce hydrostatic pressue by letting your basement be leaky.