hmm good point.
Although it depends on the following scenario:
If I buy a 300k player on Sunday afternoon, I would pay 1 weeks salary. Would I then have to pay the weeks salary on the Monday as well?
as I said beore it is something like SIGNING ON FEE, a money that player gets just for joining the club.
and, like someone said, you can pay him a SEVERENCE FEE when he leaves club, just like stuff.
each one of this suggestions would make game more fair, than it is today.