Neither of these are figures that Labour will want to crow about. But, as Giles points out, they are below the "57,000 jobs in small and medium-sized businesses alone" that the Conservatives predict in their manifesto. And they suggest that the national insurance hike will have a smaller effect on private sector employment than the Conservatives' planned efficiency savings will have on public sector employment.
Hang on a second, though. There are a couple of important caveats to make. First, that economics is a notoriously imprecise science: fact is, no formula or prediction made by an economist is ever watertight. And the second is that the Tories intend to drive their efficiency savings not by sacking public sector workers, but by not filling "back room" vacancies as they become available. Many would argue that the economy can bear that more easily than a swathe of private sector sector job losses, be they 22,000 or 100,000 in total.
To be fair, the Tories have been making something like that final point quite effectively over the past couple of weeks. But they need to be prepared for Labour's inevitable claims that the Tory policy would result in both money and jobs being, ahem, "taken out of the economy".