[SauntSolaire]

Should also include a running tally for the total net profit taken in by the government (after payouts) across all expected ticket sales. That way you can watch your number going negative while the government's balloons up into billions.

[rhplus]

This would show the big difference between the Euro and US lottery formats, where (typically) in Euro lotteries, the government takes taxes on the stake and so the jackpot is tax free, whereas in US the prize is taxed as income or windfall. This is one of the reasons why US lottery jackpots tend to be stated as much bigger than Euro ones despite having a larger purchaser pool.