That happens a lot in some of the sports here as well. If you have a good team and can hold the players together while staying under your salary cap it is pretty common. The problem is after those players bring you two or three championships they demand a higher price and soon your payroll can't afford them all.
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Payroll in football is slightly different as they don't seem to have one. They are allowed to spend a certain percentage of their turnover and most of the big clubs have high income due to ticket sales,merchandising and tv rights.