The thing is that in IT people actually want to be outside of IR35 because being a contractor is financially better for them.
So you see contractor job ads prominently listing "outside of IR35" as a benefit.
When this was implemented I know people who actually quit because they were told they would be within IR35 from then on, and they found new contracts outside of IR35.
In IT/tech people go the contracting route for the money so unsurprisingly they follow the money...
It's just a matter of rates. You need rates a bit higher within IR35. Less so than people think, and even less now that the corporation tax changes are still going through. The biggest problem with IR35 is no longer tax since the gap has become smaller and smaller, but the uncertainty of the classification and the hassle of dealing with an umbrella company.
So you see contractor job ads prominently listing "outside of IR35" as a benefit.
When this was implemented I know people who actually quit because they were told they would be within IR35 from then on, and they found new contracts outside of IR35.
In IT/tech people go the contracting route for the money so unsurprisingly they follow the money...