So the UK is facing a potential economic crisis and an exodus of businesses due to Brexit, and yet they want an expansion of the welfare state? Where are they

So the UK is facing a potential economic crisis and an exodus of businesses due to Brexit, and yet they want an expansion of the welfare state? Where are they going to get the money? The deficit is already 2% of GDP and they're £1.7 trillion in debt. Source: https://www.ons.gov.uk/economy/governmentpublicsectorandtaxes/publicspending/bulletins/ukgovernmentdebtanddeficitforeurostatmaast/june2018 https://www.ons.gov.uk/economy/governmentpublicsectorandtaxe...