The US

"If the job you're elected to do is give your constituents a vote in Washington, you should probably be there to vote." 

An American View

 On average, the current (2014) class of  U.S. senators miss 2.5 percent of all the votes during their tenure, according to data from GovTrack.

US Senate Attendance

The UK

The general rule is that all Bills have to be passed by both the House of Commons and the House of Lords except in certain circumstances.

Why focus on the Lords?

£93.1million in 2013-14

The Cost

House of Lords

What can the UK take from the US?

Solution 1: Rankings