Answer:
The government loses $1000 per tax payer, according to the following function:

Where "y" is the total money earned by the government and "x" is the number of tax payers.
Explanation:
Let's call the monetary balance of the government after one year "y", where "x" is the number of tax payers. Since each tax payer, "x", pays a total of $1500 every year, but the government spends $2500 with each one of them, then we can build a function "y(x)", with the value of collected tax being positive while the cost of each tax payer is negative, as shown below:

The government loses $1000 per tax payer.