First of all, tech isn't always high margin. Second, there are many types of companies that 'could' do this. And even if you are not a 'privileged' company (whatever that is) you can do the same scheme with lower salary.
As I pointed out, the point is not the exact number.
And margin is just one of many factors that sets the avg salary. Margin also depends on what the avg salary is. Some companies have low margin because they have to pay so much salary.
And of course Oxide is making no profit at all, so their margin is nothing.
What's the lowest margin a company could most likely have to be able to pay all of it's employees $200k/yr?