According to this source[1], the labor cost for a restaurant is 20% to 30% of gross revenue. If a restaurant decided to double the pay for their employees, then their costs would go up by 50% (25% * 2). If they increase their prices by 50% and customers still provide them business, then they won't go under.
If for instance, a meal costs around $25 today, then they would have to increase the price to $37 (or a $12 increase). Looking at one regular dish I get at a chain restaurant, I've seen its price increase from $23 to $32 in in the last year. I still eat there about as frequently as I used to. Would I still get it if it was $34.50 assuming the same labor cost? I most likely still would.
On the other hand, if the restaurant decides not to increase pay and has trouble with staffing, along with increase wait times, errors in fulfilling the order, food not prepared well, then I most likely won't eat there as often, if at all.
[1] https://www.lightspeedhq.com/blog/labor-cost-guidelines-rest...