Enhance/increase the font size, the size of the voting buttons, the gap between the voting buttons, and the size of the collapse buttons for users who have more

Enhance/increase the font size, the size of the voting buttons, the gap between the voting buttons, and the size of the collapse buttons for users who have more than 50 karma (they must have perseverance and patience to stick around, so why not reward them)? I really find the usability of these very difficult and hit the wrong one many a times. Simplicity is nice, but going through HN comments and acting on them is painful, more so on touchscreen devices.