You clearly have little idea of how the financing works.
That £16bn goes into a large pot.
And we then got things like Horizon (£2.5bn for UK scientists)
But more importantly, th EU (via SM/CU) it also drove our long-term economic growth rate to hover around 2.5%.
Do you know what that long-term growth rate is now?
Its hovering around 1%.
Thats £100bn in lost out put PER YEAR, and £40bn in less tax revenue PER YEAR.
So we are now massive net losers.
And thats not even the worst part. These losses will also compound over time as investment gets routed to the EU and US, and not the UK.
Car manufacturing and farming will be decimated.
No "if" about it. They will be shrunk accordingly because they will not be able to export as they will become totally uncompetitive.
And in terms of the old EU regeneration funds, those fund were earmarked for specific regions using actual metrics.
Why do you think Cornwall and Wales got so much EU regional funding?
Because they were poor and the UK Govt never lifted a finger to help them.
Now, post-Brexit, are those same regions receiving more money from the UK Govt?
The answer is no. They are getting materially less as the entire country (as predicted by rational experienced people) is poorer.
And that is also precisely the future that awaits the UK.
Becoming poorer relative to our European peers given the economic headwinda caused by Brexit in combination with a deteriorating demographic profile (which even massive non-EU migration will not "fix").