VA Disability Compensation and Pension (Comp & Pen) are not equatable to physical disability and employment.
That is considered "Individual Unemployability" which would qualify a person for Social Security Disability and other state benefits.

From www.benefits.va.gov:
"IU eligibility requirements: 1. You must be a Veteran 2. You must have at least one service connected disability rated at least at 60%, OR
Two or more service connected disabilities at least one disability ratable at 40 percent or more with a combined rating of 70 percent or more.
3. You must be unable to maintain substantially gainful employment as a result of service-connected disabilities (marginal employment, such as odd jobs, is not considered substantial gainful employment for VA purposes)."

"IU Evidence Requirements: 1.Evidence of at least one service connected disability AND That the service-connected disability or disabilities are sufficient, without regard to other factors, to prevent performing the mental and/or physical tasks required to get or keep substantially gainful employment AND
That one disability is ratable at 60 percent or more, OR If more than one disability exists, one disability is ratable at 40 percent or more with a combined rating of 70 percent or more."

"Under exceptional circumstances this benefit may be granted with a lower disability rating than noted above provided the evidence shows the service-connected disability or disabilities present such an exceptional or unusual disability picture, due to such factors as marked interference with employment or frequent periods of hospitalization, that applying the normal disability requirements is impractical."