Food shortages would be the results of lack of agricultural output and disruption of supply chains, which by and large is not happening. (At least to no degree that would put you at risk of serious shortages in Europe)

Non-essential workers don't influence a food shortage. If those workers stay home their income may be hurt for a while, but in contrast to 1918 we have a social security system. Nobody's going to starve.

edit: For reference, Greece suffered from 18-25% unemployment for the last ten years. The economic effects of the pandemic will have bad consequences, but it's not an existential issue, it just sucks and will destroy some wealth.