Japan is the canary in the coalmine for the wealthy nations of the world who also have declining total fertility rates.
Having said that, in the UK it's not labour shortages causing small businesses to fold - it's red tape, cost of overheads and terrible banking and utility provider practices for business owners. I experienced this when I ran my own business a few years ago. The one thing there wasn't a shortage of was good employees - however paying the minimum wage of £7.50 an hour when a coffee costs about £2.50, plus rent, fuel etc means that you have to sell a LOT of coffee - or cakes, or smoothies. Whichever way you look at it, the maths don't add up unless you're serving hundreds of people a day and getting big bulk discounts on stock. The market favours BIG businesses.