Over time will transaction fees become huge?

[laotzu]

So after years of increasing difficulty eventually all 21 million btc will have been mined.
Along with this one would hope that there will be a huge increase in the number of transactions.
Doesn't this mean that those operating hugely expensive, electricity guzzling mining rigs will need very high transaction fees in order to survice?  So high as to remove one of btc's key benefits.

[DeathAndTaxes]

The key word was huge increase in number of transactions.

If you need to make a billion dollars you could do it by selling a million widgets for $1,000 each or by selling a hundred billion widgets for $0.01 each.