Weak teams will get better players, and become better teams. However, there will always be weaker teams that run on profits, and those will always be able to bid more.
That's life -- the game is created so that the weaker teams are able to catch up, not so that the strong teams become stronger all the time.
Now that's a very good joke: are you a natural or did you think it over for a few hours? :-D
Really, I simply believe we play two totally different games.
Let me ask you a question. Do you think I'm a weaker team? Well, surprise-surprise, in the typical situation of a IV division in Italy, Spain or Germany teams don't really have the economical conditions to improve unless they make a long term (3-4 seasons) extremely careful plan (e.g. don't try to achieve a promotion unless you are absolutely sure that you will not demote the following year)... and they also need some serious luck.
If instead you think I'm a strong team, so that I must have a hard time improving... well, I simply believe that for a newcomer in Italy, Spain, or any other medium-large BB-nation there is simply no chance to make it to the top 2 divisions, and sooner or later this will reflect in the dynamics of the number of BB users.