Here's an alternative, the margins and colors may need modification. See jsfiddle link for sample result.
It has a left-aligned label and right-aligned input (button style) in a div, for each line. The non-breaking space is needed as a placeholder in the span element that represents an "empty label".
http://jsfiddle.net/qallar/kfgCb/5/
The html is:
<div class='line'>
<span class='formlabel'>label 1</span>
<input class='formbutton' type='button' value='button 1 text ' />
</div>
<div class='line'>
<span class='formlabel'> </span>
<input class='formbutton' type='button' value='button 2 text' />
</div>
and the css:
.line
{
display: block;
background-color: #ddd; /* also try #fff */
margin: 0px;
padding: 2px;
height: 30px;
width: 200px;
}
.formlabel
{
float: left;
background-color: #eee; /* also try #fff */
margin: 0px;
padding: 2px;
width: 75px;
height: 100%;
clear: both;
}
.formbutton
{
float: right;
background-color: #0f0;
margin: 0px;
padding: 0px;
width: 100px;
height: 100%;
}