What if the client would set the budget, and that's it. And the freelancers that propose to do the job, don't bid with lower (or higher) prices, but simply show

What if the client would set the budget, and that's it. And the freelancers that propose to do the job, don't bid with lower (or higher) prices, but simply show their work. This way the client would choose between the most appealing portfolio, rather than the lowest (or highest) price.