Re: if the current situation was so awful ... switching to permanent roles would be more popular
You’re actually probably getting about £400 per day for holiday/sickness etc. and another 5-10% as pension contribution...and it is much harder for them to get rid of you, even if you happen to be a useless muppet. You also don’t have to pay for indemnity insurance and all that.
Perms gripe a lot that contractors get more. Yes, we get more (not much) but I e have expenses that a perm wouldn’t think about and have to ride the famine-feast cycle. Which is why we are happy to pay the 3.3% more (+ another 20% of VAT on sales) for they flexibility and risk (https://www.contractorcalculator.co.uk/comparing_taxes_contractors_versus_employees.aspx). If you were that jealous, go and join.
Without contractors (genuine outside-IR35 ones, that is...or even those inside), this country will fri d to a halt.
Hope you’re confident that you won’t get a P45 for resting on your laurels as a perm.