The biggest pull is a ready supply of employment through a porous system that allows companies to pocket the profit and pass the liability.
However that is never going to change. All the companies whose dividends make up Nigel Farages bonuses depend on it.
If a situation hasn't changed in 50 years, then there has to be a positive energy being expended keeping it that way. That is basic physics.
Parliament is supreme. If they wanted to pass a law that fined (say) Deliveroo a million pounds for every illegal worker caught wearing their logo on their bike delivering an order via their app, they could do it.
No ifs. No buts.
Why don't Reform push that as a policy ?