We’ve been spending too much time on elections, so let’s get back to pointing out inane, foolish, and destructive government policies. Our latest example comes from the United Kingdom, where politicians are pushing airline ticket taxes to punitive levels and harming the tourism industry. But the real lesson from this story is that it is very dangerous to give politicians a new revenue source.

The airline ticket tax was first imposed by a (supposedly) Conservative Party government in 1994 at a maximum rate of 10 pounds. During the Blair/Brown Labor Party reign, the tax was boosted to a maximum rate of 50 pounds. Now, the new government, led by ostensible Conservative David Cameron, is pushing the maximum tax up to 75 pounds (more than $120) per ticket.

Here’s an excerpt from the story in the Telegraph.

Families are avoiding holidays in Egypt and the Caribbean because of the high cost of air taxes — even before the hike in passenger duty that comes into place on Monday.

…The duty, which is paid by all travellers on leaving Britain and added automatically to the price when a ticket is booked, is to increase by 50 per cent to some destinations. It is the second significant rise in two years, and figures show that previous hikes have already influenced people’s choice of holiday destinations.

…Bob Atkinson, travel expert at Travelsupermarket.com, said: “Families looking to book for this winter and summer next year will be faced with tax rises of up to 54 per cent on their family holidays. This tax rise is completely out of line with inflation and bears no relation to the original purpose of the tax.”

…The tax was introduced in 1994 at the rate of £10 on long-haul flights, but increased by the previous Government, which said it was a necessary “green measure”.

…The increases mean a family of four flying to the Caribbean will pay £300 in duty compared with the old rate of £200 or £160 last year. Willie Walsh, the chief executive of British Airways, has branded the higher taxes a “disaster”. Earlier this month, he called the duty a “disgrace”.

No wonder families are choosing not to travel. But, more important, imagine what American politicians will do if they ever succeed in imposing a value-added tax. The rate initially will be low (just as the original income tax had a top rate of just 7 percent), but nobody should delude themselves into thinking the rate won’t quickly climb as greedy politicians get hooked on a new form of revenue to feed their spending addictions.