a server hiccup may mean that you may be able to luck out and end up with a player at a bargain salary for the next 10 seasons or so. Absolutely unacceptable.
This could be solved by introducing a blindness period before the end of the auction, for example 8 hours before the deadline new maximum bids are stored by the system but no longer displayed. Therefore it would not make sense any longer to wait for the last minutes of the auction before making a bid. Which other problems do you see?
You understand this doesn't really change the situation, it just changes the location of the potential hiccup. It will always make sense to bid in the last moment, whether this is the "last moment before the deadline" or the "last moment before bids go blind".
The same problem is bound to occur in multiple different situations: the game economy has both a cycle and a trend, and I don't think replicating those issues into salary is the way to go. As in, it is one thing to be able to spend less on a one-time lump sum payment, and it's completely different to spend less on a weekly basis for the same type of player. The second one has a much stronger effect. While the suggestions are not without merit, it will be difficult (to me: next to impossible) to implement this system without introducing unwanted competitive imbalances.
Ultimately, the idea behind all of these is to have an economy where the best players are paid top dollar and teams can afford them. This was also the idea behind the salary calibration that was introduced several seasons ago. While it's questionable whether the calibration is appropriate or not, the best players in the game currently cost about 90% of the income of a top division team. Technically speaking, it is possible to build a team around such a player by picking cheap role-players off the market -- though I guess what matters is that no-one has really tried to do it, so those guys still keep going around.
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."