Update: increased reward to 5k, 1 month only.

Source of the claim: https://archive.is/57YUo
My analisys:

For USA the issue is clearly the metric used, per-capita seems quite normal, with a total rise of 10%-ish:

and the driving factor for the ~30% change in his, chosen without justification, labour force statistic is rise in participation by already disabled people, widely attributed to remote work:

For UK he analyzes claims processed, again for no discernible reason. The number of claim awarded seems inconsistent with the theory, peaking in 2016:

In total the available data seems most consistent with the official version of events, combined with a cost of living crisis leading people to seek additional support.

I will award M50-5000 to any evidence for authors' ">20% injury rate for COVID vaccines" claim based on its' strength.