I beg to differ with others who have commented. Lottery winnings and winnings from "games of luck" are NOT TAXABLE in Canada.
You win a million, or ten million dollars and you pay - ZERO - taxes on your winnings. Then, one year later you have to declare your wealth and then - you pay taxes on your income from your investments, assuming you did invest some money.
You can always put the money under your mattress, then you pay no taxes, ever. But - your money there cannot be insured. You lose your money and - you lost it all.
Why no taxes on winnings? Because the operators of casinos and other "games of chance" pay taxes on their income. There is no free lunch, the government gets its cut from you gambling, but BEFORE the winnings are paid out.
The average pay-out on 6/47 is about 36 % of the gambled money. The rest goes to the operator and - to the government as taxes.