It's all relative, will Brexit be a disaster, probably, but some of us can't get any lower on the class system so I think it will end up being the middle class hit hardest.
are you sure?
would food shortages and price hikes not affect the poor?
would a complete breakdown of the NHS - far worse than anything we've seen- not affect the poor?
would sending whatever police forces we still have off to keep the peace in Northern Ireland not affect the poor?
would shortages of medication not affect the poor?
would enabling rich people to duck out of EU rules on tax avoidance not affect the poor?
It's the wealthy and the comfortably-off middle class who can afford to sit this one out. Even people like myself, who are not well off, but could probably manage private health insurance if I cut down on everything else, who have a garden and an allotment which could be used for food production, who wouldn't come to any harm if we just ate less, who live in places not greatly affected by knife crime.
There is no way Boris & chums are going to use the end of FOM to stop Russian oligarchs buying up London- they stand to make too much money from that (and are not affected by EU rules in the first place)
note that the Tories have made it perfectly clear that rich people will still be let into the country after Brexit