govinfo.library.unt.edu/ngisc/research/lotteries.html
Quoting: This link is widely recognized, even by those in the industry. In the words of one lottery director: “[G]ambling, including playing the lottery, is … potentially addictive and can be dangerous and destructive for some people, some of the time.” 46 The new games “have created what was once an almost unthinkable link between lotteries and compulsive behavior.”
Are our consciences so seered that we believe our governments can do anything and it is moral? Cigarettes, liquor, abortion, and lotteries are all “legal”.
Lotteries are not a voluntary tax, they are predatory on minorities and the poor, offering hope in the form of the chance to be a millionaire. We as Catholics, people of God, should not put our hope in the things of the world by wasting the money God has made us stewards. We should be beacons of hope not promoters of usury.
Also, the following article outlines the 4 fold test of whether or not gambling is illicit:
Theologians commonly require four conditions so that gaming may not be illicit.
What is staked must belong to the gambler and must be at his free disposal. It is wrong, therefore, for the lawyer to stake the money of his client, or for anyone to gamble with what is necessary for the maintenance of his wife and children.
The gambler must act freely, without unjust compulsion.
There must be no fraud in the transaction, although the usual ruses of the game may be allowed. It is unlawful, accordingly, to mark the cards, but it is permissible to conceal carefully from an opponent the number of trump cards one holds.
Finally, there must be some sort of equality between the parties to make the contract equitable; it would be unfair for a combination of two expert whist players to take the money of a couple of mere novices at the game.
If any of these conditions be wanting, gambling becomes more or less wrong; and, besides, there is generally an element of danger in it which is quite sufficient to account for the bad name which it has.
newadvent.org/cathen/06375b.htm