Or 20% less today than in 1996, in gross terms? The problem is, now most freelancers are forced to create their own service companies (of one person), so the contract is between two companies and not between a company and an employee.
And in those cases, the rules are not the same, AFIK. I did ask a lawyer to get the contract reviewed in 2013 for a mission that I was baited into taking and then there is literally almost no programming involved and I wanted out.
The lawyer examined the service contract and told me that by the terms of the contract, I would have to either serve the service contract or reimburse the company for what they would lose. Maybe another lawyer would say something different, or things changed since 2013.