Inflation + population growth will result in increases unless you make a conscious decision to cut. So if you leave something alone in the budget, you'd expect it to increase naturally over time. Even if there was no internet boom, and the budget continued to rise, tax receipts would still go up b/c the economy must grow to accommodate all those kids entering the workforce each year. If you hold the line on spending increases, not eliminate the increases but put them below the rate of growth, you'll have a surplus.