Buying something is not a right. It's a privilege. You can't buy drugs. You can't buy lots of things. It's not "life, liberty, and the right to buy stuff." It's "the pursuit of happiness" which clearly is an inalienable right that is being taken from people.
It's no different than a bully on the playground taking the ball from a weaker kid. They both have a right to play with that ball, right? The bullying force just comes from a bank account -- that's all.
No, we shouldn't allow financial bullies to run rampant either.