Hit that ecosystem and you get a recession. However it doesn't stop at the recession. Most VCs are funding hundreds and thousands of startups with the hope that one of them is going to get sold to Google or Facebook or Amazon or any of the Advertising Cash Cow business. Dry that tap and you'll have VCs pulling money from Tech.
Now, there is glut of Programmer supply and a severe lack of investments. Not dissimilar to 2008.