Interesting problem - we're going to have to downgrade people's aspirations if we're not going to import people to do base-level jobs. Will cause social unrest.
Not sure that anyone's aspirations need to be downgraded. Businesses may need to be more willing to invest in efficiency improvements and automation. They may need to take on and train lower-skilled employees that they might not have considered before. And pay higher wages to attract the skills/talent they need.
…and they’ll be trying to get that investment back from the customer by charging £9+ for a glass of red wine, sigh