But they don't, they don't generate investment and they often post loses, hence why they were privatised. With railway, they only make pence per ticket, so if any investment came from private money or tax, the profit margin is still pence per ticket. So if you want railway investment, you need to raise ticket prices. The alternative is more tax. National debt is the highest since 1962. So you lay out your rail investment plan, how much it costs, and where the money comes from.
As for immigration, here's a link to GDP -
It is perhaps the most widely discussed economic concept – but what is it and how do we measure it?
www.bankofengland.co.uk
So by all means invite and hug illegals, but if you wonder why GDP falls, don't blame Brexit, blame population. Once you understand how GDP works, your rhetoric on that will wain too.
Your posts just highlights how little you know about everything, and you're not the only one, hence why Lefty parties are popular. Economics should be brought into school at an early stage, ditch this tranny and Muslim crap.