Business won't need to be tied to unnecessary EU rules and regs unless they do business with the EU. (Currently all businesses do)
What unnecessary rules and regs? How much of a problem is this? Much EU regulation is in the interests of workers.
We won't need to pay more in than we get out of the EU.
However we may need to pay vastly more by way of tariffs and other trading costs we are now exempt from.
Our security would be increased as we would have control of our borders.
We already have control of our borders. We may not have access to vital information from European intelligence and policing services after leaving the EU.
We would be able to support research, deprived communities etc in our own country
We could do these things now – why don’t we? And scientific research is already being adversely affected, even before we have left the EU.
We would allow workers to come to areas in a controlled way, so that schools and hospitals aren't overwhelmed.
This is currently a failing of our government in not anticipating a need for provision, or blatantly ignoring an existing need. The NHS would be on its knees without immigrant workers.
The workers who come here would be paid minimum/living wage and be housed in good conditions with access to schools and health facilities.
It’s not the fault of the EU that this is not happening now. It’s our fault.
We would have control of our own laws again
We have never not had control of our own laws.
We would be free to negotiate favourable trade deals with other countries
We already have a favourable trade deal with the biggest trading bloc in the world, and with other countries through it. What better deal or deals could we negotiate? With whom?