There are players who are salary efficient who's market price is much greater than 10x their salary, it's a bit unfair for those managers who might end up selling their player cheaper than they would like.
I would say the bigger issue for new teams is when they buy players and staff with big wages. Even if they spend all their money on buying rubbish players, you can't spend more money than you have. They should still be making a weekly profit, and their situation will usually recover. But with a bunch of high salaries you can go into debt, and often they don't notice they are in trouble until they hit an economic update and have a big negative balance.
Some possible alternatives:
* Start with a slightly larger arena and less starting money, more income and less chance to blow their money before they have some understanding of the game.
* Delay some of the starter money they get. Maybe wait until the team has been active for a month before the "new team" weekly bonus payments kick in.
* Discourage new teams from buying staff with high salary. I've seen several examples of new teams purchasing level 6 staff with $80k+ salaries and getting into trouble. I'm not sure how to do this, limiting them from adding staff better than say level 4 would be one solution (similar to the way teams are limited buying players based on their world rank). But if a new team is lucky enough to draft a HOF trainee that would be a bit unfair.