Can you explain the math here ? If you make $500k, at 9% progressive, it will be like 6% flat with all deductions. So tax will be $30k. Then you take a 10% pay

Can you explain the math here ? If you make $500k, at 9% progressive, it will be like 6% flat with all deductions. So tax will be $30k. Then you take a 10% pay cut. So you are losing $50k. So you lose $50k, and gain $30k. That’s negative $20k. Even if you keep your salary same, your mortgage has to be roughly $2.5k/month. That’s a 1 bedroom condo.