Ask HN: My boss lowered my salary to make me more motivated

I work 9 hrs every day in the office and another 2 at home and my boss calls me in to say I'm not working hard enough and he's lowering my pay "to motivate me". I have a triple role in the company and am close to the product design / dev / roadmap decision making.<p>I feel humiliated and angry at the same time, and am in need of any advice on how to approach this.