Suggestion: A new text attribute to scale the size of text to follow the size of a box

I´m not sure this is the right place to suggest new CSS attributes if not
please excuse me:

What I would like is an attribute that makes a text allways fill keep the
same size as that of the box its in.

Today its possible to have an image stretch with the size of a box but not
text that is place in the box, its allways static. However text is rendered
from vector so
it should be possible to make its follow the size of another object.

So if the size of the box is made smaller the text size would automatically
adjust and would not overflow and having to be hidden.
And if the size of the box is bigger the size of the text will fit and you
would not have to go back and perhaps create a new css style to adjust the
size of the text.

Example of use:

Very useful when making buttons of different sizes.
The text would allways keep to the size of the button.

Regards Gabriel