In general: no
You can only award reputation as bounties if you've already earned that reputation, and you are free to award as much of it as you like to as many posts as you like. If several posts you consider deserving of your hard-earned rep happen to belong to the same user, that's not a problem; posting great answers rarely happens by accident, so it's quite natural that a user that shares your interests with regard to challenge types, topics, and programming languages might post more than one answer that catches your eye.
In this specific case: yes
Unfortunately, moderators do not have magic wands to read the users' minds, but I have yet to find a shred of evidence that these bounties were placed with the intention to reward great answers. There's a lot that suggests quite the opposite though.
The post notice templates say
One or more of the answers is exemplary and worthy of an additional bounty.
but the user-supplied description
ton hospel is cool and i want to give him internet points.
states quite clearly that these bounties will be awarded to a person rather than their answers.
The three answers of @TonHospel that were picked for the bounties were simply their three oldest answers. I'm not saying the answers aren't good enough to get bounties, but they were certainly picked arbitrarily.
Ton Hospel has posted amazing answers that are, in my opinion, more deserving of a bounty that the three ones that were picked. For example, there's Calculate the permanent as quickly as possible which is certainly exemplary.
The (ongoing) chat discussion (starts here) and, in particular, the message
i thought it was really cool that ton hospel visited the site and participated quite a lot
speak for themselves.
Is this a problem?
I'd say so. Even the simple act of transferring reputation from one account to another is an inappropriate use of the bounty system. If that was intended to be possible, there would be a tip jar.
But that's not all bounties do! The three bountied questions will appear in the featured tab until they're awarded or expired (which might take up to 7 days). A bounty also pretty much guarantees a permanent slot on the front page. That's OK if the bounty draws attention to an exemplary answer, but not so much when they're used as "rep cheques".
What can be done about it?
I'm not saying that we will (or should) in this particular case, but moderators can refund bounties under exceptional circumstances.