(Non-)Uniform Scale constraint

I know that two unique contraints, "Uniform Scale" and "Non-uniform Scale", can be applied to splines in sketch.

But, since editing splines in sketch would almost surely lead to disrupted associativeness, the two contraints look very good, but are not usable in my workflow.

I'm wondering whether there is an easy workaround to achieve effects similar to (Non-)Uniform Scale constraint in sketch. If the workaroud is usable with general objects like arc, conic and spline outside sketcher, it woud be very very helpful.

Thanks!