Enlarge small caps and memoir headers

I enlarged the small caps of my font by using the letltxmacro package. This works fine in text, chapter titles, etc., but I'm using the \pagestyle{ruled} under memoir which causes even page headers to contain the chapter title in small caps. When using the LetLtxMacro however, these headers disappear (well, the ruler stays but the text disappears). Any ideas on how to fix this?

\documentclass[11pt,a4paper,twoside,openright]{memoir}

\usepackage[T1]{fontenc}
\usepackage[scale=0.95]{tgpagella}
\usepackage{letltxmacro,lipsum,relsize}
\LetLtxMacro{\oldscshape}{\scshape}
\renewcommand{\scshape}[1]{\oldscshape\relscale{1.2}}

\begin{document}
\pagestyle{ruled}
\chapter{Title with \textsc{small caps}}
\section{Section title}
some text \textsc{some text} some text
\lipsum
\lipsum
\lipsum
\end{document}

• Perhaps you meant \renewcommand{\scshape}[1]{\oldscshape\relscale{1.2}#1} although I am not sure if this is the most convenient way to increase the size for your small caps. – Gonzalo Medina Jun 28 '13 at 14:05

Rather than doing nasty tricks with relsize, I'd scale the fonts directly:

\documentclass[11pt,a4paper,twoside,openright]{memoir}

\usepackage[T1]{fontenc}
\usepackage[scale=0.95]{tgpagella}
\usepackage{lipsum}

\AtBeginDocument{
\DeclareFontShape{T1}{qpl}{b}{sc}{<-> [1.14] ec-qplb-sc}{}
\DeclareFontShape{T1}{qpl}{b}{scit}{<-> [1.14] ec-qplbi-sc}{}
\DeclareFontShape{T1}{qpl}{m}{sc}{<-> [1.14] ec-qplr-sc}{}
\DeclareFontShape{T1}{qpl}{m}{scit}{<-> [1.14] ec-qplri-sc}{}
}

\begin{document}
\pagestyle{ruled}
\chapter{Title with \textsc{small caps}}
\section{Section title}
some text \textsc{some text} some text
\lipsum
\lipsum
\lipsum
\end{document}


I use that 0.95*1.2=1.14; the lines have been taken from t1qpl.fd.