There wouldn't be any lost jobs. The loss of DH's would create positions for either another position player or pitcher. The roster numbers wouldn't change.
There was discussion this morning about this. Obviously, the union doesn't want to lose the DH because it isn't just losing a job, it is losing a job for high-profile, highly-paid players. The suggested concession was to expand the roster a couple of spots to allow for an extra pitcher or two, or subs given that taking the DH away makes it even more desireable to have a 26th or 27th spot. But I don't think that will fly. While the thought is that the union would be swayed by the additional job or two, they are likely to protect the higher-paid positions.
But even beyond the union, the DH produces more offense which makes more money for the owners. So I don't see it happening. I don't like he DH, but at this point, would prefer uniformity.