5.2% Growth in GDP in 2022 seems a bit optimistic to me. I have not come across a business over recent months that is not complaining about the ability to recruit. I suspect that lack of skilled labour will be the greatest constraint on future growth.
My view on the lack of available labour is that Covid caused what some commentators are calling the great resignation, where a substantial number of over 50's have just said to themselves, enough is enough and then Brexit caused a large number of Europeans to return home.